| July 2026 - LDT | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DoW | Date | Moon days | Dark Code | Max moon Illum | Time Range (MST) | No moon/ night hrs | Frac night | Prog ID | Principal | Remote | Instrument | Requested Filters/Gratings | TO | Intended LMI Filter Setup | Intended DeVeny Grating |
| Wed | Jul-01 | 12.1 | b b | 95% 95% | 20:48-00:28 00:28-04:09 | 0.0 / 3.7 0.0 / 3.7 | 0.5 0.5 | N02 E01 | Farrell Engineering | On-Site | LMI LMI | VR,V,R,I,g,r,i r | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN HαOn g r i z CN RC VR Oiii | DV2 (300g/mm,4000A) |
| Thu | Jul-02 | 11.1 | g b b | 90% 90% 90% | 20:48-22:38 22:38-00:29 00:29-04:09 | 0.4 / 1.8 0.0 / 1.9 0.0 / 3.7 | 0.25 0.25 0.5 | L02 Y01 E01 | Polanski Brewer Engineering | Remote Requested Remote Requested | EXPRES EXPRES LMI | r | BM OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN HαOn g r i z CN RC VR Oiii | DV2 (300g/mm,4000A) |
| Fri | Jul-03 | 10.1 | D b | 84% 84% | 20:47-22:38 22:38-04:10 | 0.9 / 1.9 0.0 / 5.5 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN HαOn g r i z CN RC VR Oiii | DV2 (300g/mm,4000A) |
| Sat | Jul-04 | 9.1 | g | 75% | 20:47-04:10 | 1.3 / 7.4 | 1.0 | E01 | Engineering | LMI | r | BS OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN HαOn g r i z CN RC VR Oiii | DV2 (300g/mm,4000A) | |
| Sun | Jul-05 | 8.1 | D g | 66% 65% | 20:47-00:29 00:29-04:11 | 1.8 / 3.7 0.0 / 3.7 | 0.5 0.5 | W04 E01 | Hallakoun Engineering | Remote Requested | EXPRES LMI | r | IN BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN HαOn g r i z CN RC VR Oiii | DV2 (300g/mm,4000A) |
| Mon | Jul-06 | 7.1 | D g | 0% 55% | 20:47-22:38 22:38-04:12 | 1.2 / 1.9 1.0 / 5.6 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | CS BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN HαOn g r i z CN RC VR Oiii | DV2 (300g/mm,4000A) |
| Tue | Jul-07 | 6.1 | D D g g | 0% 44% 44% 43% | 20:46-22:38 22:38-00:29 00:29-02:20 02:20-04:12 | 1.2 / 1.9 1.5 / 1.9 0.0 / 1.9 0.0 / 1.9 | 0.25 0.25 0.25 0.25 | N09 E01 M02 L09 | Thomas Engineering Kelley Schleicher | Remote Requested Remote Requested Remote Requested | LMI LMI LMI LMI | VR,g,r,i,z r g,r,i,z,VR,OH,CN,BC,RC,C2,C3,UC r,CN,OH,BC | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Jul-08 | 5.1 | D D g g | 0% 0% 33% 32% | 20:46-22:38 22:38-00:30 00:30-02:21 02:21-04:13 | 1.2 / 1.9 1.9 / 1.9 0.1 / 1.9 0.0 / 1.9 | 0.25 0.25 0.25 0.25 | L02 Y01 E01 L09 | Polanski Brewer Engineering Schleicher | Remote Requested Remote Requested Remote Requested | EXPRES EXPRES LMI LMI | r r,CN,OH,BC | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Jul-09 | 4.1 | D D D | 0% 22% 22% | 20:46-00:30 00:30-02:22 02:22-04:14 | 3.1 / 3.7 0.8 / 1.9 0.0 / 1.9 | 0.5 0.25 0.25 | M01 E01 L09 | Stein Engineering Schleicher | Remote Requested Remote Requested | DEVENY,LMI,RIMAS LMI LMI | u,g,r,i,z,DV2 r r,CN,OH,BC | BM OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Jul-10 | 3.1 | D D D | 0% 0% 13% | 20:45-22:37 22:37-00:30 00:30-04:14 | 1.2 / 1.9 1.9 / 1.9 1.6 / 3.7 | 0.25 0.25 0.5 | N09 Y01 L10 | Thomas Brewer Wasserman | Remote Requested Remote Requested Remote Requested | LMI EXPRES LMI | VR,g,r,i,z VR | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Jul-11 | 2.1 | D | 6% | 20:45-04:15 | 5.7 / 7.5 | 1.0 | E01 | Engineering | LMI | r | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sun | Jul-12 | 1.1 | D | 0% | 20:44-04:16 | 6.2 / 7.5 | 1.0 | E01 | Engineering | LMI | r | IN BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Mon | Jul-13 | 0.1 | D | 0% | 20:44-04:17 | 6.3 / 7.5 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Tue | Jul-14 | 0.9 | D | 0% | 20:43-04:17 | 6.3 / 7.6 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Wed | Jul-15 | 1.9 | D | 4% | 20:43-04:18 | 6.3 / 7.6 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Thu | Jul-16 | 2.9 | D | 10% | 20:42-04:19 | 6.2 / 7.6 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Fri | Jul-17 | 3.9 | D | 18% | 20:41-04:20 | 5.8 / 7.7 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Sat | Jul-18 | 4.9 | D | 27% | 20:41-04:21 | 5.4 / 7.7 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Sun | Jul-19 | 5.9 | D | 37% | 20:40-04:21 | 5.0 / 7.7 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Mon | Jul-20 | 6.9 | D | 48% | 20:39-04:22 | 4.5 / 7.7 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Tue | Jul-21 | 7.9 | D | 58% | 20:38-04:23 | 4.0 / 7.8 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Wed | Jul-22 | 8.9 | g | 67% | 20:38-04:24 | 3.5 / 7.8 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Thu | Jul-23 | 9.9 | g | 76% | 20:37-04:25 | 2.9 / 7.8 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Fri | Jul-24 | 10.9 | g | 84% | 20:36-04:26 | 2.2 / 7.8 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Sat | Jul-25 | 11.9 | g | 90% | 20:35-04:27 | 1.4 / 7.9 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Sun | Jul-26 | 12.9 | b | 95% | 20:34-04:28 | 0.5 / 7.9 | 1.0 | E03 | Shutdown | n/a | n/a | n/a | |||
| Mon | Jul-27 | 13.9 | b | 99% | 20:33-04:28 | 0.0 / 7.9 | 1.0 | E01 | Engineering | LMI | r | CS BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Tue | Jul-28 | 14.4 | b b | 100% 100% | 20:32-22:31 22:31-04:29 | 0.0 / 2.0 0.0 / 6.0 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Jul-29 | 13.4 | b | 100% | 20:31-04:30 | 0.0 / 8.0 | 1.0 | E01 | Engineering | LMI | r | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Thu | Jul-30 | 12.4 | b b b | 98% 97% 97% | 20:30-22:30 22:30-00:30 00:30-04:31 | 0.0 / 2.0 0.0 / 2.0 0.0 / 4.0 | 0.25 0.25 0.5 | L02 Y01 N03 | Polanski Brewer Madden-Watson | Remote Requested Remote Requested Remote Requested | EXPRES EXPRES DEVENY | DV1 | BM OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| Fri | Jul-31 | 11.4 | b b | 93% 93% | 20:29-00:31 00:31-04:32 | 0.0 / 4.0 0.0 / 4.0 | 0.5 0.5 | E04 E01 | Engineering Engineering | EYE,LMI LMI | r | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| August 2026 - LDT | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DoW | Date | Moon days | Dark Code | Max moon Illum | Time Range (MST) | No moon/ night hrs | Frac night | Prog ID | Principal | Remote | Instrument | Requested Filters/Gratings | TO | Intended LMI Filter Setup | Intended DeVeny Grating |
| Sat | Aug-01 | 10.4 | g b | 87% 86% | 20:28-00:31 00:31-04:33 | 0.2 / 4.0 0.0 / 4.0 | 0.5 0.5 | E04 E01 | Engineering Engineering | EYE,LMI LMI | r | IN BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sun | Aug-02 | 9.4 | g b | 79% 79% | 20:27-22:29 22:29-04:34 | 0.7 / 2.0 0.0 / 6.1 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | IN BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Aug-03 | 8.4 | g g | 70% 68% | 20:26-04:35 03:35-04:35 | 1.1 / 8.2 0.0 / 1.0 | 1.0 0.12 | E01 M03 | Engineering Kelley | ToO | LMI DEVENY,LMI | r r,DV2 | CS BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Aug-04 | 7.4 | D g g | 0% 59% 59% | 20:25-22:28 22:28-04:36 22:28-01:28 | 1.5 / 2.0 0.2 / 6.1 0.2 / 3.0 | 0.25 0.75 0.37 | Y01 E01 M03 | Brewer Engineering Kelley | Remote Requested ToO | EXPRES LMI DEVENY,LMI | r r,DV2 | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Aug-05 | 6.4 | D g | 48% 47% | 20:24-00:31 00:31-04:37 | 2.3 / 4.1 0.0 / 4.1 | 0.5 0.5 | N06 E01 | Emery Engineering | Remote Requested | DEVENY LMI | DV1 (150g/mm) r | BM | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| Thu | Aug-06 | 5.4 | D g g | 36% 36% 35% | 20:23-00:30 00:30-02:34 02:34-04:38 | 3.0 / 4.1 0.0 / 2.1 0.0 / 2.1 | 0.5 0.25 0.25 | N06 E01 M02 | Emery Engineering Kelley | Remote Requested Remote Requested | DEVENY LMI LMI | DV1 (150g/mm) r g,r,i,z,VR,OH,CN,BC,RC,C2,C3,UC | BM OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| Fri | Aug-07 | 4.4 | D D D | 0% 0% 25% | 20:21-22:25 22:25-00:30 00:30-04:39 | 1.5 / 2.1 2.1 / 2.1 0.4 / 4.2 | 0.25 0.25 0.5 | Y01 L09 E01 | Brewer Schleicher Engineering | Remote Requested Remote Requested | EXPRES LMI LMI | r,CN,OH,BC r | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Aug-08 | 3.4 | D D D | 0% 0% 15% | 20:20-22:25 22:25-00:30 00:30-04:40 | 1.5 / 2.1 2.1 / 2.1 1.4 / 4.2 | 0.25 0.25 0.5 | Y01 L09 E01 | Brewer Schleicher Engineering | Remote Requested Remote Requested | EXPRES LMI LMI | r,CN,OH,BC r | BS OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Aug-09 | 2.4 | D | 7% | 20:19-04:41 | 6.2 / 8.4 | 1.0 | E01 | Engineering | LMI | r | IN BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Mon | Aug-10 | 1.4 | D | 2% | 20:18-04:41 | 7.3 / 8.4 | 1.0 | B05 | Guidry | Remote Requested | LMI | g | CS BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Aug-11 | 0.4 | D | 0% | 20:17-04:42 | 7.3 / 8.4 | 1.0 | E01 | Engineering | LMI | r | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Wed | Aug-12 | 0.6 | D | 0% | 20:15-04:43 | 7.3 / 8.5 | 1.0 | L10 | Wasserman | Remote Requested | LMI | VR | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Aug-13 | 1.6 | D | 0% | 20:14-04:44 | 7.4 / 8.5 | 1.0 | E01 | Engineering | LMI | r | BM OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Fri | Aug-14 | 2.6 | D | 7% | 20:13-04:45 | 7.5 / 8.5 | 1.0 | E01 | Engineering | LMI | r | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sat | Aug-15 | 3.6 | D D | 14% 0% | 20:11-22:20 22:20-04:46 | 1.5 / 2.1 5.9 / 6.4 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Aug-16 | 4.6 | D D | 22% 0% | 20:10-00:29 00:29-04:47 | 3.2 / 4.3 3.8 / 4.3 | 0.5 0.5 | N04 M01 | Clark Stein | Remote Requested Remote Requested | LMI DEVENY,LMI,RIMAS | g,r,i,z u,g,r,i,z,DV2 | IN BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Aug-17 | 5.6 | D | 31% | 20:09-04:48 | 6.5 / 8.7 | 1.0 | Y01 | Brewer | Remote Requested | EXPRES | CS BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Tue | Aug-18 | 6.6 | g D | 41% 0% | 20:07-22:17 22:17-04:49 | 0.0 / 2.2 6.0 / 6.5 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | BM BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Aug-19 | 7.6 | g D D | 51% 51% 0% | 20:06-22:17 22:17-00:28 00:28-04:50 | 0.0 / 2.2 1.6 / 2.2 3.8 / 4.4 | 0.25 0.25 0.5 | L02 Y01 E01 | Polanski Brewer Engineering | Remote Requested Remote Requested | EXPRES EXPRES LMI | r | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Aug-20 | 8.6 | g D | 60% 0% | 20:05-02:39 02:39-04:51 | 3.1 / 6.6 1.7 / 2.2 | 0.75 0.25 | L03 L03 | Polanski Polanski | Remote Requested Remote Requested | EXPRES EXPRES | BM OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Fri | Aug-21 | 9.6 | g D | 69% 70% | 20:03-22:15 22:15-04:52 | 0.0 / 2.2 4.0 / 6.6 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Aug-22 | 10.6 | g | 78% | 20:02-04:52 | 3.1 / 8.8 | 1.0 | E01 | Engineering | LMI | r | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sun | Aug-23 | 11.6 | g | 86% | 20:01-04:53 | 2.2 / 8.9 | 1.0 | E01 | Engineering | LMI | r | IN BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Mon | Aug-24 | 12.6 | b b g | 91% 92% 92% | 19:59-22:13 22:13-00:27 00:27-04:54 | 0.0 / 2.2 0.0 / 2.2 1.2 / 4.5 | 0.25 0.25 0.5 | Y01 E01 N03 | Brewer Engineering Madden-Watson | Remote Requested Remote Requested | EXPRES LMI DEVENY | r DV1 | CS BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| Tue | Aug-25 | 13.6 | b | 97% | 19:58-04:55 | 0.2 / 8.9 | 1.0 | E01 | Engineering | LMI | r | CS BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Wed | Aug-26 | 14.6 | b | 99% | 19:56-04:56 | 0.0 / 9.0 | 1.0 | E01 | Engineering | LMI | r | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Thu | Aug-27 | 13.9 | b b | 100% 100% | 19:55-22:11 22:11-04:57 | 0.0 / 2.3 0.0 / 6.8 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | BM OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Aug-28 | 12.9 | b | 99% | 19:53-04:58 | 0.0 / 9.1 | 1.0 | E01 | Engineering | LMI | r | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sat | Aug-29 | 11.9 | b | 96% | 19:52-04:58 | 0.0 / 9.1 | 1.0 | E01 | Engineering | LMI | r | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sun | Aug-30 | 10.9 | b | 90% | 19:50-04:59 | 0.0 / 9.2 | 1.0 | E01 | Engineering | LMI | r | IN BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Mon | Aug-31 | 9.9 | g b b | 83% 82% 81% | 19:49-22:07 22:07-00:25 00:25-05:00 | 0.4 / 2.3 0.0 / 2.3 0.0 / 4.6 | 0.25 0.25 0.5 | L02 Y01 E01 | Polanski Brewer Engineering | Remote Requested Remote Requested | EXPRES EXPRES LMI | r | CS BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| September 2026 - LDT | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DoW | Date | Moon days | Dark Code | Max moon Illum | Time Range (MST) | No moon/ night hrs | Frac night | Prog ID | Principal | Remote | Instrument | Requested Filters/Gratings | TO | Intended LMI Filter Setup | Intended DeVeny Grating |
| Tue | Sep-01 | 8.9 | g b | 73% 73% | 19:48-22:06 22:06-05:01 | 0.9 / 2.3 0.0 / 6.9 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Sep-02 | 7.9 | D g | 62% 62% | 19:46-22:05 22:05-05:02 | 1.7 / 2.3 0.0 / 7.0 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Sep-03 | 6.9 | g | 50% | 19:45-05:03 | 2.5 / 9.3 | 1.0 | B07 | Dong | Remote Requested | DEVENY | DV6 (Clear) | BM OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV6 (600g/mm,4900A) |
| Fri | Sep-04 | 5.9 | D | 38% | 19:43-05:03 | 3.5 / 9.3 | 1.0 | N01 | Hemmelgarn | Remote Requested | LMI | u,g,r,i,z,VR | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Sep-05 | 4.9 | D D | 0% 27% | 19:42-22:02 22:02-05:04 | 1.8 / 2.3 2.8 / 7.0 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | IN BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Sep-06 | 3.9 | D | 17% | 19:40-05:05 | 5.9 / 9.4 | 1.0 | B05 | Guidry | Remote Requested | LMI | g | IN BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Sep-07 | 2.9 | D D | 0% 9% | 19:39-22:01 22:01-05:06 | 1.9 / 2.4 5.2 / 7.1 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | CS BS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Sep-08 | 1.9 | b D D | 0% 3% 3% | 19:07-19:37 19:37-05:07 05:07-05:37 | 0.0 / 0.0 8.3 / 9.5 0.0 / 0.0 | 0. 1.0 0. | L06 L07 L06 | Thirouin Thirouin Thirouin | Remote Requested Remote Requested Remote Requested | LMI LMI LMI | I,VR,g,r,i,z VR,g,r,i,z I,VR,g,r,i,z | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Sep-09 | 0.9 | D D | 0% 0% | 19:36-00:22 00:22-05:08 | 4.3 / 4.8 4.3 / 4.8 | 0.5 0.5 | E01 L14 | Engineering Massey | Remote Requested | LMI DEVENY,EXPRES,LMI | r WC,WN,CT,B,V,DV5 | BM CS | OPEN DARK H2O+ C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV5 (500g/mm,5500A) |
| Thu | Sep-10 | 0.1 | D D | 0% 0% | 19:34-21:58 21:58-05:08 | 1.9 / 2.4 6.7 / 7.2 | 0.25 0.75 | L13 E01 | Levine Engineering | Remote Requested | GWAVES,LMI,POETS LMI | VR,RC,g,r r | BM OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Sep-11 | 1.1 | D | 0% | 19:33-05:09 | 8.6 / 9.6 | 1.0 | B06 | Ould Rouis | Remote Requested | DEVENY | DV2 (300g/mm,4000A) | IN OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Sep-12 | 2.1 | D | 0% | 19:31-05:10 | 8.7 / 9.7 | 1.0 | E01 | Engineering | LMI | r | BS OW | OPEN DARK H2O+ C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sun | Sep-13 | 3.1 | D D D D | 10% 0% 0% 0% | 18:31-20:00 20:00-21:55 21:55-00:21 00:21-05:11 | 0.0 / 0.5 1.9 / 1.9 2.4 / 2.4 4.3 / 4.8 | 0.05 0.2 0.25 0.5 | L01 E01 L09 L14 | Zhang Engineering Schleicher Massey | Remote Requested Remote Requested Remote Requested | LMI LMI LMI DEVENY,EXPRES,LMI | r,NH r r,CN,OH,BC WC,WN,CT,B,V,DV5 | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV5 (500g/mm,5500A) |
| Mon | Sep-14 | 4.1 | D D D D | 17% 17% 0% 0% | 18:29-19:58 19:58-21:54 21:54-00:20 00:20-05:12 | 0.0 / 0.5 1.7 / 1.9 2.4 / 2.4 4.4 / 4.9 | 0.05 0.2 0.25 0.5 | L01 E01 L09 E01 | Zhang Engineering Schleicher Engineering | Remote Requested Remote Requested | LMI LMI LMI LMI | r,NH r r,CN,OH,BC r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Sep-15 | 5.1 | D | 25% | 19:27-05:12 | 7.9 / 9.8 | 1.0 | E01 | Engineering | LMI | r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV2 (300g/mm,4000A) | |
| Wed | Sep-16 | 6.1 | g D D | 33% 34% 0% | 18:26-19:55 19:55-00:19 00:19-05:13 | 0.0 / 0.5 2.9 / 4.4 4.4 / 4.9 | 0.05 0.45 0.5 | L01 E01 L14 | Zhang Engineering Massey | Remote Requested Remote Requested | LMI LMI DEVENY,EXPRES,LMI | r,NH r WC,WN,CT,B,V,DV5 | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV5 (500g/mm,5500A) |
| Thu | Sep-17 | 7.1 | g D D | 43% 43% 0% | 18:25-19:54 19:54-00:19 00:19-05:14 | 0.0 / 0.5 2.1 / 4.4 4.4 / 4.9 | 0.05 0.45 0.5 | L01 E01 L14 | Zhang Engineering Massey | Remote Requested Remote Requested | LMI LMI DEVENY,EXPRES,LMI | r,NH r WC,WN,CT,B,V,DV5 | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV5 (500g/mm,5500A) |
| Fri | Sep-18 | 8.1 | g D | 52% 53% | 19:22-20:36 20:36-05:15 | 0.0 / 1.2 5.7 / 8.7 | 0.12 0.88 | L01 E01 | Zhang Engineering | Remote Requested | LMI LMI | r,NH r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Sep-19 | 9.1 | g g D | 62% 63% 0% | 19:21-21:49 21:49-00:18 00:18-05:15 | 0.0 / 2.5 0.3 / 2.5 4.5 / 5.0 | 0.25 0.25 0.5 | L02 Y01 M02 | Polanski Brewer Kelley | Remote Requested Remote Requested Remote Requested | EXPRES EXPRES LMI | g,r,i,z,VR,OH,CN,BC,RC,C2,C3,UC | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Sep-20 | 10.1 | b b D | 71% 71% 72% | 19:19-20:34 20:34-23:03 23:03-05:16 | 0.0 / 1.2 0.0 / 2.5 3.8 / 6.2 | 0.13 0.25 0.62 | L01 Y01 E01 | Zhang Brewer Engineering | Remote Requested Remote Requested | LMI EXPRES LMI | r,NH r | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Sep-21 | 11.1 | b b g | 79% 80% 81% | 19:18-20:33 20:33-23:03 23:03-05:17 | 0.0 / 1.2 0.0 / 2.5 2.8 / 6.2 | 0.13 0.25 0.62 | L01 Y01 E01 | Zhang Brewer Engineering | Remote Requested Remote Requested | LMI EXPRES LMI | r,NH r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Sep-22 | 12.1 | b b D | 87% 88% 88% | 19:16-21:46 21:46-02:48 02:48-05:18 | 0.0 / 2.5 0.0 / 5.0 1.8 / 2.5 | 0.25 0.5 0.25 | Y01 W04 E01 | Brewer Hallakoun Engineering | Remote Requested Remote Requested | EXPRES EXPRES LMI | r | BM BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Sep-23 | 13.1 | b | 94% | 19:15-05:18 | 0.8 / 10.1 | 1.0 | E01 | Engineering | LMI | r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Thu | Sep-24 | 14.1 | b b | 97% 98% | 19:13-20:29 20:29-05:19 | 0.0 / 1.3 0.0 / 8.8 | 0.13 0.87 | L01 E01 | Zhang Engineering | Remote Requested | LMI LMI | r,NH r | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Sep-25 | 14.2 | b b | 100% 100% | 19:12-21:44 21:44-05:20 | 0.0 / 2.5 0.0 / 7.6 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Sep-26 | 13.2 | b | 100% | 19:10-05:21 | 0.0 / 10.2 | 1.0 | E01 | Engineering | LMI | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sun | Sep-27 | 12.2 | b b | 97% 97% | 19:09-21:42 21:42-05:22 | 0.0 / 2.5 0.0 / 7.7 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Sep-28 | 11.2 | b | 93% | 19:08-05:22 | 0.0 / 10.2 | 1.0 | E01 | Engineering | LMI | r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Tue | Sep-29 | 10.2 | g b b | 85% 85% 84% | 19:06-21:40 21:40-00:15 00:15-05:23 | 0.3 / 2.6 0.0 / 2.6 0.0 / 5.1 | 0.25 0.25 0.5 | L02 Y01 E01 | Polanski Brewer Engineering | Remote Requested Remote Requested | EXPRES EXPRES LMI | r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Sep-30 | 9.2 | g b | 76% 75% | 19:05-21:40 21:40-05:24 | 1.1 / 2.6 0.0 / 7.7 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| October 2026 - LDT | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DoW | Date | Moon days | Dark Code | Max moon Illum | Time Range (MST) | No moon/ night hrs | Frac night | Prog ID | Principal | Remote | Instrument | Requested Filters/Gratings | TO | Intended LMI Filter Setup | Intended DeVeny Grating |
| Thu | Oct-01 | 8.2 | D g | 0% 65% | 19:03-21:39 21:39-05:25 | 2.1 / 2.6 0.0 / 7.8 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Oct-02 | 7.2 | D g | 0% 53% | 19:02-21:38 21:38-05:25 | 2.1 / 2.6 1.1 / 7.8 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Oct-03 | 6.2 | D | 41% | 19:01-05:26 | 4.4 / 10.4 | 1.0 | B07 | Dong | Remote Requested | DEVENY | DV6 (Clear) | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV6 (600g/mm,4900A) |
| Sun | Oct-04 | 5.2 | D | 30% | 18:59-05:27 | 5.6 / 10.5 | 1.0 | L11 | Hemmelgarn | Remote Requested | LMI | u,g,r,i,z,VR | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Oct-05 | 4.2 | D D | 0% 19% | 18:58-21:36 21:36-05:28 | 2.1 / 2.6 4.7 / 7.9 | 0.25 0.75 | L01 E01 | Zhang Engineering | Remote Requested | LMI LMI | r,NH,OH r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Oct-06 | 3.2 | D D D | 0% 0% 11% | 18:56-21:34 21:34-02:50 02:50-05:28 | 2.1 / 2.6 5.3 / 5.3 0.5 / 2.6 | 0.25 0.5 0.25 | L01 L14 E01 | Zhang Massey Engineering | Remote Requested Remote Requested | LMI DEVENY,EXPRES,LMI LMI | r,NH,OH WC,WN,CT,B,V,DV5 r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV5 (500g/mm,5500A) |
| Wed | Oct-07 | 2.2 | D D D | 0% 0% 5% | 18:55-21:33 21:33-00:13 00:13-05:29 | 2.1 / 2.6 2.7 / 2.7 4.2 / 5.3 | 0.25 0.25 0.5 | L01 Y01 E01 | Zhang Brewer Engineering | Remote Requested Remote Requested | LMI EXPRES LMI | r,NH,OH r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Oct-08 | 1.2 | D | 0% | 18:54-05:30 | 9.7 / 10.6 | 1.0 | L10 | Wasserman | Remote Requested | LMI | VR | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Oct-09 | 0.2 | b D D | 0% 0% 0% | 18:23-18:52 18:52-05:31 05:31-06:00 | 0.0 / 0.0 9.7 / 10.7 0.0 / 0.0 | 0. 1.0 0. | L06 L07 L06 | Thirouin Thirouin Thirouin | Remote Requested Remote Requested Remote Requested | LMI LMI LMI | I,VR,g,r,i,z VR,g,r,i,z I,VR,g,r,i,z | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Oct-10 | 0.8 | D D | 0% 0% | 18:51-00:11 00:11-05:31 | 4.8 / 5.3 4.9 / 5.3 | 0.5 0.5 | L14 E01 | Massey Engineering | Remote Requested | DEVENY,EXPRES,LMI LMI | WC,WN,CT,B,V,DV5 r | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV5 (500g/mm,5500A) |
| Sun | Oct-11 | 1.8 | D D | 0% 0% | 18:50-21:30 21:30-05:32 | 2.2 / 2.7 7.6 / 8.0 | 0.25 0.75 | L03 L03 | Polanski Polanski | Remote Requested Remote Requested | EXPRES EXPRES | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV2 (300g/mm,4000A) | |
| Mon | Oct-12 | 2.8 | D D D D | 0% 0% 0% 0% | 18:49-00:11 00:11-02:52 02:52-04:13 04:13-05:33 | 4.9 / 5.4 2.7 / 2.7 1.4 / 1.4 0.9 / 1.3 | 0.5 0.25 0.13 0.12 | L03 Y01 E01 L01 | Polanski Brewer Engineering Zhang | Remote Requested Remote Requested Remote Requested | QWSSI EXPRES LMI LMI | r CN,C3,C2,BC,RC,r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Oct-13 | 3.8 | D D D D | 12% 0% 0% 0% | 18:47-21:29 21:29-00:11 00:11-04:13 04:13-05:34 | 2.1 / 2.7 2.7 / 2.7 4.0 / 4.0 0.9 / 1.4 | 0.25 0.25 0.37 0.13 | Y01 L04 E01 L01 | Brewer Minker Engineering Zhang | Remote Requested Remote Requested Remote Requested | EXPRES QWSSI LMI LMI | r CN,C3,C2,BC,RC,r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN WC g r WN CT CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Oct-14 | 4.8 | D D | 19% 0% | 18:46-00:10 00:10-05:35 | 4.1 / 5.4 4.9 / 5.4 | 0.5 0.5 | L09 M01 | Schleicher Stein | Remote Requested Remote Requested | LMI DEVENY,LMI,RIMAS | r,CN,OH,BC u,g,r,i,z,DV2 | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Oct-15 | 5.8 | D D | 27% 0% | 18:45-00:10 00:10-05:35 | 3.3 / 5.4 5.0 / 5.4 | 0.5 0.5 | L09 N02 | Schleicher Farrell | Remote Requested On-Site | LMI LMI | r,CN,OH,BC VR,V,R,I,g,r,i | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Oct-16 | 6.8 | D | 36% | 18:44-05:36 | 7.3 / 10.9 | 1.0 | E01 | Engineering | LMI | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sat | Oct-17 | 7.8 | g D D | 45% 45% 0% | 18:42-21:26 21:26-04:15 04:15-05:37 | 0.0 / 2.7 5.5 / 6.8 0.9 / 1.4 | 0.25 0.62 0.13 | Y01 E01 L01 | Brewer Engineering Zhang | Remote Requested Remote Requested | EXPRES LMI LMI | r CN,C3,C2,BC,RC,r | BS OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Oct-18 | 8.8 | g g D D | 54% 55% 0% 0% | 18:41-21:25 21:25-00:10 00:10-04:16 04:16-05:38 | 0.0 / 2.7 0.4 / 2.8 4.1 / 4.1 0.9 / 1.4 | 0.25 0.25 0.37 0.12 | E01 L04 E01 L01 | Engineering Minker Engineering Zhang | Remote Requested Remote Requested | LMI QWSSI LMI LMI | r r CN,C3,C2,BC,RC,r | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Oct-19 | 9.8 | g g | 64% 65% | 18:40-21:24 21:24-05:38 | 0.0 / 2.7 4.4 / 8.2 | 0.25 0.75 | Y01 L03 | Brewer Polanski | Remote Requested Remote Requested | EXPRES EXPRES | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Tue | Oct-20 | 10.8 | g D | 74% 0% | 18:39-04:17 04:17-05:39 | 2.5 / 9.6 0.9 / 1.4 | 0.88 0.12 | E01 L01 | Engineering Zhang | Remote Requested | LMI LMI | r CN,C3,C2,BC,RC,r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Oct-21 | 11.8 | g D | 83% 0% | 18:38-04:17 04:17-05:40 | 1.5 / 9.7 0.9 / 1.4 | 0.87 0.13 | E01 L01 | Engineering Zhang | Remote Requested | LMI LMI | r CN,C3,C2,BC,RC,r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Oct-22 | 12.8 | b D | 90% 0% | 18:37-04:18 04:18-05:41 | 0.5 / 9.7 0.9 / 1.4 | 0.88 0.12 | E01 L01 | Engineering Zhang | Remote Requested | LMI LMI | r CN,C3,C2,BC,RC,r | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Oct-23 | 13.8 | b b b g | 95% 95% 96% 96% | 18:36-21:22 21:22-00:08 00:08-04:19 04:19-05:42 | 0.0 / 2.8 0.0 / 2.8 0.0 / 4.2 0.3 / 1.4 | 0.25 0.25 0.38 0.12 | Y01 L04 E01 L01 | Brewer Minker Engineering Zhang | Remote Requested Remote Requested Remote Requested | EXPRES QWSSI LMI LMI | r CN,C3,C2,BC,RC,r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Oct-24 | 14.8 | b | 99% | 18:35-05:42 | 0.0 / 11.1 | 1.0 | E01 | Engineering | LMI | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sun | Oct-25 | 14.0 | b b | 100% 100% | 18:34-00:08 00:08-05:43 | 0.0 / 5.6 0.0 / 5.6 | 0.5 0.5 | L03 N03 | Polanski Madden-Watson | Remote Requested Remote Requested | QWSSI DEVENY | DV1 | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| Mon | Oct-26 | 13.0 | b b | 99% 98% | 18:33-21:21 21:21-05:44 | 0.0 / 2.8 0.0 / 8.4 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Oct-27 | 12.0 | b | 95% | 18:32-05:45 | 0.0 / 11.2 | 1.0 | E01 | Engineering | LMI | r | BM BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Wed | Oct-28 | 11.0 | b | 88% | 18:31-05:46 | 0.5 / 11.2 | 1.0 | B02 | Muirhead | Remote Requested | LMI,RIMAS | I,z | BM BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Oct-29 | 10.0 | g | 79% | 18:30-05:47 | 1.6 / 11.3 | 1.0 | B02 | Muirhead | Remote Requested | LMI,RIMAS | I,z | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Oct-30 | 9.0 | g | 68% | 18:29-05:47 | 2.8 / 11.3 | 1.0 | B02 | Muirhead | Remote Requested | LMI,RIMAS | I,z | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Oct-31 | 8.0 | D g g | 56% 55% 54% | 18:28-00:08 00:08-02:58 02:58-05:48 | 4.0 / 5.7 0.0 / 2.8 0.0 / 2.8 | 0.5 0.25 0.25 | N04 L02 Y01 | Clark Polanski Brewer | Remote Requested Remote Requested Remote Requested | LMI EXPRES EXPRES | g,r,i,z | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| November 2026 - LDT | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DoW | Date | Moon days | Dark Code | Max moon Illum | Time Range (MST) | No moon/ night hrs | Frac night | Prog ID | Principal | Remote | Instrument | Requested Filters/Gratings | TO | Intended LMI Filter Setup | Intended DeVeny Grating |
| Sun | Nov-01 | 7.0 | D D g | 0% 44% 44% | 18:27-21:17 21:17-00:08 00:08-05:49 | 2.4 / 2.8 2.8 / 2.9 0.0 / 5.7 | 0.25 0.25 0.5 | W03 L04 E01 | Zackay Minker Engineering | Remote Requested Remote Requested | QWSSI QWSSI LMI | r | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Nov-02 | 6.0 | b D g | 0% 33% 31% | 17:56-18:26 18:26-05:50 05:50-06:20 | 0.0 / 0.0 6.3 / 11.4 0.0 / 0.0 | 0. 1.0 0. | L06 L07 L06 | Thirouin Thirouin Thirouin | Remote Requested Remote Requested Remote Requested | LMI LMI LMI | I,VR,g,r,i,z VR,g,r,i,z I,VR,g,r,i,z | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Nov-03 | 5.0 | D | 23% | 18:25-05:51 | 7.4 / 11.4 | 1.0 | L11 | Hemmelgarn | Remote Requested | LMI | u,g,r,i,z,VR | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Nov-04 | 4.0 | D D D | 0% 0% 14% | 18:24-00:08 00:08-03:00 03:00-05:52 | 5.2 / 5.7 2.9 / 2.9 0.4 / 2.9 | 0.5 0.25 0.25 | L09 Y01 E01 | Schleicher Brewer Engineering | Remote Requested Remote Requested | LMI EXPRES LMI | r,CN,OH,BC r | BM BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Nov-05 | 3.0 | D D | 0% 8% | 18:24-00:08 00:08-05:52 | 5.2 / 5.7 4.2 / 5.7 | 0.5 0.5 | L09 E01 | Schleicher Engineering | Remote Requested | LMI LMI | r,CN,OH,BC r | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Nov-06 | 2.0 | D D D | 0% 0% 3% | 18:23-00:08 00:08-03:01 03:01-05:53 | 5.3 / 5.8 2.9 / 2.9 2.4 / 2.9 | 0.5 0.25 0.25 | E01 Y01 B04 | Engineering Brewer Gray | Remote Requested Remote Requested | LMI EXPRES EXPRES | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Nov-07 | 1.0 | b D D | 0% 0% 0% | 17:52-18:22 18:22-05:54 05:54-06:24 | 0.0 / 0.0 10.6 / 11.5 0.0 / 0.0 | 0. 1.0 0. | L06 L08 L06 | Thirouin Thirouin Thirouin | Remote Requested Remote Requested Remote Requested | LMI LMI LMI | I,VR,g,r,i,z VR,g,r,i,z I,VR,g,r,i,z | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Nov-08 | 0.0 | D | 0% | 18:21-05:55 | 10.6 / 11.6 | 1.0 | E01 | Engineering | LMI | r | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Mon | Nov-09 | 1.0 | D D D | 0% 0% 0% | 18:21-21:15 21:15-03:02 03:02-05:56 | 2.4 / 2.9 5.8 / 5.8 2.4 / 2.9 | 0.25 0.5 0.25 | Y01 E01 B04 | Brewer Engineering Gray | Remote Requested Remote Requested | EXPRES LMI EXPRES | r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Nov-10 | 2.0 | D D D | 0% 0% 0% | 18:20-21:14 21:14-03:03 03:03-05:57 | 2.4 / 2.9 5.8 / 5.8 2.4 / 2.9 | 0.25 0.5 0.25 | Y01 E01 B04 | Brewer Engineering Gray | Remote Requested Remote Requested | EXPRES LMI EXPRES | r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Nov-11 | 3.0 | D | 7% | 18:19-05:58 | 10.7 / 11.7 | 1.0 | B05 | Guidry | Remote Requested | LMI | g | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Nov-12 | 4.0 | D | 13% | 18:19-05:58 | 9.8 / 11.7 | 1.0 | E01 | Engineering | LMI | r | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Fri | Nov-13 | 5.0 | D D | 20% 0% | 18:18-00:09 00:09-05:59 | 3.5 / 5.8 5.3 / 5.8 | 0.5 0.5 | E01 L05 | Engineering Brasseur | Remote Requested | LMI EXPRES | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Nov-14 | 6.0 | g D D | 28% 28% 0% | 18:18-21:14 21:14-00:09 00:09-06:00 | 0.0 / 2.9 2.6 / 2.9 5.4 / 5.8 | 0.25 0.25 0.5 | N08 Y01 L05 | Hanley Brewer Brasseur | Remote Requested Remote Requested Remote Requested | DEVENY,EXPRES EXPRES EXPRES | DV1 | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| Sun | Nov-15 | 7.0 | g D | 37% 0% | 18:17-00:09 00:09-06:01 | 1.6 / 5.9 5.4 / 5.9 | 0.5 0.5 | E01 L05 | Engineering Brasseur | Remote Requested | LMI EXPRES | r | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Nov-16 | 8.0 | g g D | 46% 47% 0% | 18:17-21:13 21:13-00:09 00:09-06:02 | 0.0 / 2.9 0.6 / 2.9 5.4 / 5.9 | 0.25 0.25 0.5 | L02 Y01 L05 | Polanski Brewer Brasseur | Remote Requested Remote Requested Remote Requested | EXPRES EXPRES EXPRES | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Tue | Nov-17 | 9.0 | g g D | 56% 57% 57% | 18:16-21:13 21:13-00:10 00:10-06:03 | 0.0 / 3.0 0.0 / 3.0 5.0 / 5.9 | 0.25 0.25 0.5 | N08 E01 L13 | Hanley Engineering Levine | Remote Requested Remote Requested | DEVENY,EXPRES LMI GWAVES,LMI,POETS | DV1 r VR,g,r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| Wed | Nov-18 | 10.0 | g g D | 67% 67% 0% | 18:16-00:10 00:10-03:07 03:07-06:04 | 0.0 / 5.9 1.6 / 3.0 2.5 / 3.0 | 0.5 0.25 0.25 | N03 Y01 B04 | Madden-Watson Brewer Gray | Remote Requested Remote Requested Remote Requested | DEVENY EXPRES EXPRES | DV1 | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| Thu | Nov-19 | 11.0 | b g D | 76% 77% 0% | 18:15-21:13 21:13-03:07 03:07-06:05 | 0.0 / 3.0 0.5 / 5.9 2.5 / 3.0 | 0.25 0.5 0.25 | N08 E01 B04 | Hanley Engineering Gray | Remote Requested Remote Requested | DEVENY,EXPRES LMI EXPRES | DV1 r | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| Fri | Nov-20 | 12.0 | b D | 86% 86% | 18:15-03:07 03:07-06:05 | 0.0 / 8.9 1.9 / 3.0 | 0.75 0.25 | E01 B04 | Engineering Gray | Remote Requested | LMI EXPRES | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Nov-21 | 13.0 | b g | 93% 93% | 18:14-03:08 03:08-06:06 | 0.0 / 8.9 0.8 / 3.0 | 0.75 0.25 | E01 B04 | Engineering Gray | Remote Requested | LMI EXPRES | r | BS OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Nov-22 | 14.0 | b b | 98% 98% | 18:14-03:09 03:09-06:07 | 0.0 / 8.9 0.0 / 3.0 | 0.75 0.25 | E01 B04 | Engineering Gray | Remote Requested | LMI EXPRES | r | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Nov-23 | 14.9 | b b b | 100% 100% 100% | 18:14-21:12 21:12-00:11 00:11-06:08 | 0.0 / 3.0 0.0 / 3.0 0.0 / 6.0 | 0.25 0.25 0.5 | L02 Y01 E01 | Polanski Brewer Engineering | Remote Requested Remote Requested | EXPRES EXPRES LMI | r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Nov-24 | 13.9 | b b | 100% 99% | 18:14-21:13 21:13-06:09 | 0.0 / 3.0 0.0 / 8.9 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Nov-25 | 12.9 | b | 97% | 18:13-06:10 | 0.0 / 11.9 | 1.0 | E01 | Engineering | LMI | r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Thu | Nov-26 | 11.9 | g b | 91% 90% | 18:13-21:12 21:12-06:10 | 0.8 / 3.0 0.0 / 9.0 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Nov-27 | 10.9 | g b | 82% 81% | 18:13-00:12 00:12-06:11 | 2.0 / 6.0 0.0 / 6.0 | 0.5 0.5 | B03 E01 | Gray Engineering | Remote Requested | EXPRES LMI | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Nov-28 | 9.9 | D g | 0% 72% | 18:13-21:13 21:13-06:12 | 2.5 / 3.0 0.7 / 9.0 | 0.25 0.75 | W03 E01 | Zackay Engineering | Remote Requested | QWSSI LMI | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Nov-29 | 8.9 | g | 60% | 18:13-06:13 | 4.4 / 12.0 | 1.0 | E01 | Engineering | LMI | r | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Mon | Nov-30 | 7.9 | D D g | 0% 49% 48% | 18:13-21:13 21:13-03:14 03:14-06:14 | 2.5 / 3.0 3.0 / 6.0 0.0 / 3.0 | 0.25 0.5 0.25 | Y01 N07 E01 | Brewer Emery Engineering | Remote Requested Remote Requested | EXPRES DEVENY LMI | DV1 (150g/mm) r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| December 2026 - LDT | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DoW | Date | Moon days | Dark Code | Max moon Illum | Time Range (MST) | No moon/ night hrs | Frac night | Prog ID | Principal | Remote | Instrument | Requested Filters/Gratings | TO | Intended LMI Filter Setup | Intended DeVeny Grating |
| Tue | Dec-01 | 6.9 | D D g | 0% 38% 37% | 18:12-00:13 00:13-03:14 03:14-06:15 | 5.5 / 6.0 1.1 / 3.0 0.0 / 3.0 | 0.5 0.25 0.25 | M01 Y01 E01 | Stein Brewer Engineering | Remote Requested Remote Requested | DEVENY,LMI,RIMAS EXPRES LMI | u,g,r,i,z,DV2 r | BM BS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Dec-02 | 5.9 | D D | 0% 27% | 18:12-00:14 00:14-06:15 | 5.5 / 6.0 2.0 / 6.0 | 0.5 0.5 | L09 E01 | Schleicher Engineering | Remote Requested | LMI LMI | r,CN,OH,BC r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Dec-03 | 4.9 | D D D | 0% 0% 19% | 18:12-00:15 00:15-03:15 03:15-06:16 | 5.5 / 6.0 3.0 / 3.0 0.1 / 3.0 | 0.5 0.25 0.25 | L09 Y01 E01 | Schleicher Brewer Engineering | Remote Requested Remote Requested | LMI EXPRES LMI | r,CN,OH,BC r | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Dec-04 | 3.9 | D | 11% | 18:12-06:17 | 9.6 / 12.1 | 1.0 | E01 | Engineering | LMI | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sat | Dec-05 | 2.9 | D | 6% | 18:13-06:18 | 10.6 / 12.1 | 1.0 | B01 | Zamudio Ruvalcaba | Remote Requested | LMI,DEVENY | U,B,V,R,I,DV2 | IN OW | OPEN DARK NH C2 C3 I R V B U OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Dec-06 | 1.9 | D | 0% | 18:13-06:18 | 11.1 / 12.1 | 1.0 | B01 | Zamudio Ruvalcaba | Remote Requested | LMI,DEVENY | U,B,V,R,I,DV9 | IN BS | OPEN DARK NH C2 C3 I R V B U OPEN u g r i z CN RC VR BC | DV9 (1200g/mm,5000A) |
| Mon | Dec-07 | 0.9 | D | 0% | 18:13-06:19 | 11.1 / 12.1 | 1.0 | L11 | Hemmelgarn | Remote Requested | LMI | u,g,r,i,z,VR | CS BS | OPEN DARK NH C2 C3 I R V B U OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Dec-08 | 0.1 | b D D | 0% 0% 0% | 17:41-18:13 18:13-06:20 06:20-06:51 | 0.0 / 0.0 11.1 / 12.1 0.0 / 0.0 | 0. 1.0 0. | L06 L08 L06 | Thirouin Thirouin Thirouin | Remote Requested Remote Requested Remote Requested | LMI LMI LMI | I,VR,g,r,i,z VR,g,r,i,z I,VR,g,r,i,z | CS BS | OPEN DARK NH C2 C3 I R V B U OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Dec-09 | 1.1 | D | 0% | 18:13-06:21 | 11.1 / 12.1 | 1.0 | L10 | Wasserman | Remote Requested | LMI | VR | BM CS | OPEN DARK NH C2 C3 I R V B U OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Dec-10 | 2.1 | D D | 4% 0% | 18:13-00:17 00:17-06:21 | 5.5 / 6.1 5.6 / 6.1 | 0.5 0.5 | E01 N10 | Engineering Trujillo | On-Site | LMI LMI | r VR,g,r,i | BM OW | OPEN DARK NH C2 C3 I R V B U OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Fri | Dec-11 | 3.1 | D | 8% | 18:13-06:22 | 10.4 / 12.2 | 1.0 | B06 | Ould Rouis | Remote Requested | DEVENY | DV2 (300g/mm,4000A) | IN OW | OPEN DARK NH C2 C3 I R V B U OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Dec-12 | 4.1 | b D D | 13% 14% 0% | 17:42-18:14 18:14-06:23 06:23-06:54 | 0.0 / 0.0 9.4 / 12.2 0.0 / 0.0 | 0. 1.0 0. | L06 L07 L06 | Thirouin Thirouin Thirouin | Remote Requested Remote Requested Remote Requested | LMI LMI LMI | I,VR,g,r,i,z VR,g,r,i,z I,VR,g,r,i,z | IN OW | OPEN DARK NH C2 C3 I R V B U OPEN u g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Dec-13 | 5.1 | D D D D | 21% 21% 0% 0% | 18:14-21:16 21:16-00:18 00:18-03:21 03:21-06:23 | 0.0 / 3.0 2.9 / 3.0 3.0 / 3.0 2.5 / 3.0 | 0.25 0.25 0.25 0.25 | N08 Y01 E01 B01 | Hanley Brewer Engineering Zamudio Ruvalcaba | Remote Requested Remote Requested Remote Requested | DEVENY,EXPRES EXPRES LMI RIMAS,LMI | DV1 r U,B,V,R,I | IN BS | OPEN DARK NH C2 C3 I R V B U OPEN u g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| Mon | Dec-14 | 6.1 | D D | 30% 0% | 18:14-00:19 00:19-06:24 | 1.9 / 6.1 5.6 / 6.1 | 0.5 0.5 | L03 N10 | Polanski Trujillo | Remote Requested On-Site | QWSSI LMI | VR,g,r,i | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Dec-15 | 7.1 | g D | 40% 0% | 18:15-00:20 00:20-06:25 | 1.0 / 6.1 5.6 / 6.1 | 0.5 0.5 | M02 E01 | Kelley Engineering | Remote Requested | LMI LMI | g,r,i,z,VR,OH,CN,BC,RC,C2,C3,UC r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Wed | Dec-16 | 8.1 | g g D | 49% 50% 0% | 18:15-21:17 21:17-00:20 00:20-06:25 | 0.0 / 3.0 0.0 / 3.0 5.6 / 6.1 | 0.25 0.25 0.5 | Y01 L04 N02 | Brewer Minker Farrell | Remote Requested Remote Requested On-Site | EXPRES QWSSI LMI | VR,V,R,I,g,r,i | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Dec-17 | 9.1 | g g D | 59% 61% 0% | 18:15-21:18 21:18-03:23 03:23-06:26 | 0.0 / 3.0 2.0 / 6.1 2.5 / 3.0 | 0.25 0.5 0.25 | Y01 N07 E01 | Brewer Emery Engineering | Remote Requested Remote Requested | EXPRES DEVENY LMI | DV1 (150g/mm) r | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV1 (150g/mm,5000A) |
| Fri | Dec-18 | 10.1 | g D | 70% 71% | 18:16-00:22 00:22-06:26 | 0.0 / 6.1 3.5 / 6.1 | 0.5 0.5 | E01 B03 | Engineering Gray | Remote Requested | LMI EXPRES | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sat | Dec-19 | 11.1 | b b g | 79% 80% 81% | 18:16-21:19 21:19-00:22 00:22-06:27 | 0.0 / 3.0 0.0 / 3.0 2.4 / 6.1 | 0.25 0.25 0.5 | L02 Y01 E01 | Polanski Brewer Engineering | Remote Requested Remote Requested | EXPRES EXPRES LMI | r | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Dec-20 | 12.1 | b b | 88% 90% | 18:17-21:19 21:19-06:27 | 0.0 / 3.0 1.2 / 9.1 | 0.25 0.75 | Y01 E01 | Brewer Engineering | Remote Requested | EXPRES LMI | r | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Dec-21 | 13.1 | b | 96% | 18:17-06:28 | 0.0 / 12.2 | 1.0 | E01 | Engineering | LMI | r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Tue | Dec-22 | 14.1 | b | 99% | 18:18-06:28 | 0.0 / 12.2 | 1.0 | E01 | Engineering | LMI | r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Wed | Dec-23 | 14.7 | b b b | 100% 100% 100% | 18:18-21:21 21:21-00:24 00:24-06:29 | 0.0 / 3.0 0.0 / 3.0 0.0 / 6.1 | 0.25 0.25 0.5 | L02 Y01 E01 | Polanski Brewer Engineering | Remote Requested Remote Requested | EXPRES EXPRES LMI | r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Thu | Dec-24 | 13.7 | b | 98% | 18:19-06:29 | 0.0 / 12.2 | 1.0 | E01 | Engineering | LMI | r | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Fri | Dec-25 | 12.7 | b | 93% | 18:19-06:30 | 0.7 / 12.2 | 1.0 | E01 | Engineering | LMI | r | IN OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Sat | Dec-26 | 11.7 | g b | 86% 85% | 18:20-00:25 00:25-06:30 | 1.9 / 6.1 0.0 / 6.1 | 0.5 0.5 | L03 E01 | Polanski Engineering | Remote Requested | QWSSI LMI | r | BS OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Sun | Dec-27 | 10.7 | D g b | 0% 76% 75% | 18:20-21:22 21:22-00:26 00:26-06:30 | 2.5 / 3.0 0.6 / 3.1 0.0 / 6.1 | 0.25 0.25 0.5 | M02 L04 W04 | Kelley Minker Hallakoun | Remote Requested Remote Requested Remote Requested | LMI QWSSI EXPRES | g,r,i,z,VR,OH,CN,BC,RC,C2,C3,UC | IN BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Mon | Dec-28 | 9.7 | D g g | 0% 65% 65% | 18:21-21:23 21:23-00:26 00:26-06:31 | 2.5 / 3.0 1.7 / 3.0 0.0 / 6.1 | 0.25 0.25 0.5 | W03 Y01 E01 | Zackay Brewer Engineering | Remote Requested Remote Requested | QWSSI EXPRES LMI | r | CS BS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) |
| Tue | Dec-29 | 8.7 | g | 54% | 18:22-06:31 | 5.3 / 12.2 | 1.0 | E01 | Engineering | LMI | r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Wed | Dec-30 | 7.7 | D | 44% | 18:22-06:31 | 6.3 / 12.2 | 1.0 | E01 | Engineering | LMI | r | BM CS | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
| Thu | Dec-31 | 6.7 | D | 33% | 18:23-06:32 | 7.3 / 12.2 | 1.0 | E01 | Engineering | LMI | r | BM OW | OPEN DARK NH C2 C3 I R V B OH OPEN UC g r i z CN RC VR BC | DV2 (300g/mm,4000A) | |
Note: Half-night handover times are calculated for local astronomical midnight.
Note: Nominal night duration is from Nautical Twilight (12deg) to Nautical Twilight.
Program ID codes: L=Lowell, B=BU, G=UT/KASI(IGRINS), M=UMd/GSFC, N=NAU, T=UToledo, W=Weizmann, X=External, Y=Yale, E=Engineering
Dark code (D=dark, g=gray, b=bright) methodology: At a time resolution of 1 minute, calculate the fractional illumination of the moon for the allocated time (ignoring time during astronomical/nautical/civil twilights & setting to zero for when the moon is below the horizon). Determine the dark code from the mean value of this metric where D=dark for <={0}, g=gray for <={1}, and b=bright for >0.7.
Remote: If entry is "Remote Requested", then remote observing request is pending and not yet approved. If entry is "Remote" then remote request is approved. If entry is blank, or is "On-Site", then observers are expected to be on-site at LDT.
Bolded red items are Time Critical Observations, during which ToO interrupts will not be accepted.
Italicized gray items are engineering optional interrupts (EOI) for brief testing. Principal will be notified before the start of the prior night if any of this time will be used for a quick engineering test.
| 2026B Approved Target of Opportunity (ToO) Programs | |||||
|---|---|---|---|---|---|
| Program ID | Principal | ToO Type | Time Allocated (hours) | Time Remaining (hours) | Requested Instrument & Filters/Grating |
| L01 | Zhang | Slow | 8.00 | 8.00 | LMI,DEVENY,EXPRES: CO+,H2O+,CN,C3,C2,BC,RC,g,r,i,VR |
| L06 | Thirouin | Slow | 4.00 | 4.00 | LMI: I,VR,g,r,i,z |
| L12 | Moskovitz | Slow | 40.00 | 40.00 | DEVENY,LMI,NIHTS,RIMAS: u,g,r,i,z,VR,DV1 (150g/mm - preferred),DV2 (300g/mm) |
| M02 | Kelley | Slow | 3.00 | 3.00 | LMI,DEVENY,RIMAS: OH,CN,BC,RC,DV2 (300g/mm) |
| M03 | Kelley | Slow | 6.00 | 2.00 | DEVENY,LMI: r,DV2 |
| M04 | Rastinejad | Slow | 9.00 | 9.00 | DEVENY,LMI,RIMAS: u,g,r,i,z,Y,J,H,K,DV2 (300g/mm,4000A) |
| N05 | Cantelas | Slow | 2.50 | 2.50 | LMI: g,r,i,z |
| W01 | Zimmerman | Rapid | 8.00 | 8.00 | DEVENY: DV2 |
| W01 | Zimmerman | Rapid | 4.00 | 4.00 | RIMAS: |
| W02 | Garrappa | Rapid | 2.00 | 2.00 | DEVENY: DV2 |
| Totals | 86.50 | 82.50 | |||
On nights when the DeVeny is not in use, it should be left in the following configuration in order to be ready for ToO programs:
Grating: DV2 (300 lines / mm, 4000A blaze) Grating tilt: 22.28 Collimator Focus: 11.25 mm Slit Width: 1.5" (0.23 mm) Rear Filter Wheel: Clear Front Filter Wheel: Clear
Targets of Opportunity (ToO) requests: 1) will only be accepted for approved ToO programs. 2) will not be accepted during any Time Critical Observation (TCO). 3) May be requested during engineering time (programs designated ENN), but will be accepted, delayed, or rejected at the discretion of the Principal or Lead Engineer for that engineering time. Click here to link to LDT policies regarding ToO programs.
Operations Staff (Position) email at lowell.edu:
Timothy Ellsworth-Bowers (SuppAst) TB; tbowers@
Kyler Kuehn (DirTech) KK; kkuehn@
Stephen Levine (Ast/TelSci) SL; sel@
Beck Maier (TelOp) BM; emaier@
Ishara Nisley (TelOp) IN; inisley@
Observer (Observer) OBS;
Safety Tech (Safety Tech) ST;
Ben Shafransky (TelOp) BS; bshafransky@
Cecilia Siqueiros (TelOp) CS; csiqueiros@
Kathryn Turrentine (Safety) KT; kturrentine@
Visitor (Visitor) VST;
Olivia Weiss (TelOp) OW; oweiss@
Summary of dates on which approved programs are scheduled (note some dates are partial nights):
B01 Zamudio Ruvalcaba 2026-12-05, 2026-12-06, 2026-12-13
B02 Muirhead 2026-10-28, 2026-10-29, 2026-10-30
B03 Gray 2026-11-27, 2026-12-18
B04 Gray 2026-11-06, 2026-11-09, 2026-11-10, 2026-11-18, 2026-11-19, 2026-11-20
2026-11-21, 2026-11-22
B05 Guidry 2026-08-10, 2026-09-06, 2026-11-11
B06 Ould Rouis 2026-09-11, 2026-12-11
B07 Dong 2026-09-03, 2026-10-03
L01 Zhang 2026-09-13, 2026-09-14, 2026-09-16, 2026-09-17, 2026-09-18, 2026-09-20
2026-09-21, 2026-09-24, 2026-10-05, 2026-10-06, 2026-10-07, 2026-10-12
2026-10-13, 2026-10-17, 2026-10-18, 2026-10-20, 2026-10-21, 2026-10-22
2026-10-23
L02 Polanski 2026-07-02, 2026-07-08, 2026-07-30, 2026-08-19, 2026-08-31, 2026-09-19
2026-09-29, 2026-10-31, 2026-11-16, 2026-11-23, 2026-12-19, 2026-12-23
L03 Polanski 2026-08-20, 2026-10-11, 2026-10-12, 2026-10-19, 2026-10-25, 2026-12-14
2026-12-26
L04 Minker 2026-10-13, 2026-10-18, 2026-10-23, 2026-11-01, 2026-12-16, 2026-12-27
L05 Brasseur 2026-11-13, 2026-11-14, 2026-11-15, 2026-11-16
L06 Thirouin 2026-09-08, 2026-10-09, 2026-11-02, 2026-11-07, 2026-12-08, 2026-12-12
L07 Thirouin 2026-09-08, 2026-10-09, 2026-11-02, 2026-12-12
L08 Thirouin 2026-11-07, 2026-12-08
L09 Schleicher 2026-07-07, 2026-07-08, 2026-07-09, 2026-08-07, 2026-08-08, 2026-09-13
2026-09-14, 2026-10-14, 2026-10-15, 2026-11-04, 2026-11-05, 2026-12-02
2026-12-03
L10 Wasserman 2026-07-10, 2026-08-12, 2026-10-08, 2026-12-09
L11 Hemmelgarn 2026-10-04, 2026-11-03, 2026-12-07
L12 Moskovitz
L13 Levine 2026-09-10, 2026-11-17
L14 Massey 2026-09-09, 2026-09-13, 2026-09-16, 2026-09-17, 2026-10-06, 2026-10-10
M01 Stein 2026-07-09, 2026-08-16, 2026-10-14, 2026-12-01
M02 Kelley 2026-07-07, 2026-08-06, 2026-09-19, 2026-12-15, 2026-12-27
M03 Kelley 2026-08-03, 2026-08-04
M04 Rastinejad
N01 Hemmelgarn 2026-09-04
N02 Farrell 2026-07-01, 2026-10-15, 2026-12-16
N03 Madden-Watson 2026-07-30, 2026-08-24, 2026-10-25, 2026-11-18
N04 Clark 2026-08-16, 2026-10-31
N05 Cantelas
N06 Emery 2026-08-05, 2026-08-06
N07 Emery 2026-11-30, 2026-12-17
N08 Hanley 2026-11-14, 2026-11-17, 2026-11-19, 2026-12-13
N09 Thomas 2026-07-07, 2026-07-10
N10 Trujillo 2026-12-10, 2026-12-14
W01 Zimmerman
W02 Garrappa
W03 Zackay 2026-11-01, 2026-11-28, 2026-12-28
W04 Hallakoun 2026-07-05, 2026-09-22, 2026-12-27
Y01 Brewer 2026-07-02, 2026-07-03, 2026-07-06, 2026-07-08, 2026-07-10, 2026-07-28
2026-07-30, 2026-08-02, 2026-08-04, 2026-08-07, 2026-08-08, 2026-08-15
2026-08-17, 2026-08-18, 2026-08-19, 2026-08-21, 2026-08-24, 2026-08-27
2026-08-31, 2026-09-01, 2026-09-02, 2026-09-05, 2026-09-07, 2026-09-19
2026-09-20, 2026-09-21, 2026-09-22, 2026-09-25, 2026-09-27, 2026-09-29
2026-09-30, 2026-10-01, 2026-10-02, 2026-10-07, 2026-10-12, 2026-10-13
2026-10-17, 2026-10-19, 2026-10-23, 2026-10-26, 2026-10-31, 2026-11-04
2026-11-06, 2026-11-09, 2026-11-10, 2026-11-14, 2026-11-16, 2026-11-18
2026-11-23, 2026-11-24, 2026-11-26, 2026-11-30, 2026-12-01, 2026-12-03
2026-12-13, 2026-12-16, 2026-12-17, 2026-12-19, 2026-12-20, 2026-12-23
2026-12-28
E01 Engineering 2026-07-01, 2026-07-02, 2026-07-03, 2026-07-04, 2026-07-05, 2026-07-06
2026-07-07, 2026-07-08, 2026-07-09, 2026-07-11, 2026-07-12, 2026-07-27
2026-07-28, 2026-07-29, 2026-07-31, 2026-08-01, 2026-08-02, 2026-08-03
2026-08-04, 2026-08-05, 2026-08-06, 2026-08-07, 2026-08-08, 2026-08-09
2026-08-11, 2026-08-13, 2026-08-14, 2026-08-15, 2026-08-18, 2026-08-19
2026-08-21, 2026-08-22, 2026-08-23, 2026-08-24, 2026-08-25, 2026-08-26
2026-08-27, 2026-08-28, 2026-08-29, 2026-08-30, 2026-08-31, 2026-09-01
2026-09-02, 2026-09-05, 2026-09-07, 2026-09-09, 2026-09-10, 2026-09-12
2026-09-13, 2026-09-14, 2026-09-15, 2026-09-16, 2026-09-17, 2026-09-18
2026-09-20, 2026-09-21, 2026-09-22, 2026-09-23, 2026-09-24, 2026-09-25
2026-09-26, 2026-09-27, 2026-09-28, 2026-09-29, 2026-09-30, 2026-10-01
2026-10-02, 2026-10-05, 2026-10-06, 2026-10-07, 2026-10-10, 2026-10-12
2026-10-13, 2026-10-16, 2026-10-17, 2026-10-18, 2026-10-20, 2026-10-21
2026-10-22, 2026-10-23, 2026-10-24, 2026-10-26, 2026-10-27, 2026-11-01
2026-11-04, 2026-11-05, 2026-11-06, 2026-11-08, 2026-11-09, 2026-11-10
2026-11-12, 2026-11-13, 2026-11-15, 2026-11-17, 2026-11-19, 2026-11-20
2026-11-21, 2026-11-22, 2026-11-23, 2026-11-24, 2026-11-25, 2026-11-26
2026-11-27, 2026-11-28, 2026-11-29, 2026-11-30, 2026-12-01, 2026-12-02
2026-12-03, 2026-12-04, 2026-12-10, 2026-12-13, 2026-12-15, 2026-12-17
2026-12-18, 2026-12-19, 2026-12-20, 2026-12-21, 2026-12-22, 2026-12-23
2026-12-24, 2026-12-25, 2026-12-26, 2026-12-28, 2026-12-29, 2026-12-30
2026-12-31
E03 Shutdown 2026-07-13, 2026-07-14, 2026-07-15, 2026-07-16, 2026-07-17, 2026-07-18
2026-07-19, 2026-07-20, 2026-07-21, 2026-07-22, 2026-07-23, 2026-07-24
2026-07-25, 2026-07-26
E04 Engineering 2026-07-31, 2026-08-01
ID PI Name Title B01 Zamudio Ruvalcaba The search for the youngest and oldest debris disks B02 Muirhead Multi-wavelength Observations of L and T Dwarfs with LDT-RIMAS B03 Gray Searching for Exocomets in Northern Hemisphere Debris Disks with High-Resolution Spectroscopy B04 Gray Mysteries of the universe solved: A superbly wrong title for a stupendously strong proposal for an absurdly large amount of telescope time B05 Guidry Empirically Testing the Boundaries of a New White Dwarf Instability Strip B06 Ould Rouis The search for most massive remnant exoplanet host star B07 Dong Exploring Stellar Coronal Mass Ejections through LDT Spectroscopy L01 Zhang Comets near the Sun L02 Polanski The Jovian Architectures Survey (JAS): An EXPRES Route to Understanding ExoSolar Systems L03 Polanski Confirmation and System Characterization of Ariel Targets L04 Minker A Speckle-tacular study of triplicity in main-belt and hungarian asteroids L05 Brasseur Tracing stellar prominences on V1358 Ori L06 Thirouin Twilight Asteroids: Target of Opportunity and Survey L07 Thirouin The fraction of contact binaries in the trans-Neptunian belt L08 Thirouin Mutual events in the trans-Neptunian belt L09 Schleicher Jet Morphology in Comets 10P/Tempel 2 and 2P/Encke L10 Wasserman Astrometric Measures of Centaurs and Kuiper Belt Objects L11 Hemmelgarn Color and Activity Survey of Centaurs L12 Moskovitz NEO Rapid Response L13 Levine Occultations of Bodies in the Outer Solar System L14 Massey A Deep Search for Wolf-Rayet Stars in M31, Take III M01 Stein Classically Scheduled Imaging & Spectroscopy of Transients and Their Host Galaxies M02 Kelley Observations of Comets and Asteroids M03 Kelley Observations of near-Sun comets M04 Rastinejad ToO Observations of Relativistic Transients N01 Hemmelgarn Color and Activity Survey of Centaurs N02 Farrell Confirmation and Characterization of Unusual Active Bodies N03 Madden-Watson Visible Spectroscopy of Low-Perihelion Objects N04 Clark Early LSST Followup N05 Cantelas Rapid Response Follow-Up Observations for Unusual Near-Earth Objects N06 Emery Visible spectra of Hungaria group asteroids N07 Emery Visible spectra of Trojan asteroids N08 Hanley Constraining the vertical abundances of haze and methane on Titan N09 Thomas A Search for Activity on (3552) Don Quixote N10 Trujillo Recovery of Extreme trans-Neptunian Objects in Search of a Distant Massive Planet W01 Zimmerman Infant Supernovae -- Observing Massive Stars as They Explode W02 Garrappa Extragalactic Neutrino Sources - Unvealing Elusive Messengers in the Transient Sky W03 Zackay Speckle Pattern Reconstruction for High Contrast Imaging W04 Hallakoun Unveiling the progenitors of massive white dwarfs in intermediate-separation binaries Y01 Brewer Yale Exoplanet Survey E01 Engineering Night Engineering E03 Shutdown Summer Shutdown E04 Engineering Philanthropy
New users needing training: 2026-11-06: B04 Gray: Gray is a new LDT and EXPRES user 2026-11-27: B03 Gray: New users of LDT and EXPRES. 2026-12-10: N10 Trujillo: Trujillo/Farrell training two new observers.
Latest as of 2026-06-16T18:26:22.630937+00:00 UTC