2025B LDT Schedule

(Most column headers include added "mouse over" information.)

July 2025 - 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	Jul-01	6.9	g D	44% 0%	20:48-00:28 00:28-04:09	0.7 / 3.7 3.0 / 3.7	0.5 0.5	tbd tbd
Wed	Jul-02	7.9	g D	54% 0%	20:48-00:29 00:29-04:09	0.3 / 3.7 3.0 / 3.7	0.5 0.5	tbd tbd
Thu	Jul-03	8.9	g D	64% 64%	20:47-00:29 00:29-04:10	0.0 / 3.7 3.0 / 3.7	0.5 0.5	tbd tbd
Fri	Jul-04	9.9	b D	72% 73%	20:47-00:29 00:29-04:11	0.0 / 3.7 2.5 / 3.7	0.5 0.5	tbd tbd
Sat	Jul-05	10.9	b D	80% 81%	20:47-00:29 00:29-04:11	0.0 / 3.7 2.0 / 3.7	0.5 0.5	tbd tbd
Sun	Jul-06	11.9	b g	87% 88%	20:47-00:29 00:29-04:12	0.0 / 3.7 1.4 / 3.7	0.5 0.5	tbd tbd
Mon	Jul-07	12.9	b g	93% 94%	20:46-00:29 00:29-04:12	0.0 / 3.7 0.7 / 3.7	0.5 0.5	tbd tbd
Tue	Jul-08	13.9	b b	97% 98%	20:46-00:30 00:30-04:13	0.0 / 3.7 0.0 / 3.7	0.5 0.5	tbd tbd
Wed	Jul-09	14.6	b b	99% 100%	20:45-00:30 00:30-04:14	0.0 / 3.8 0.0 / 3.7	0.5 0.5	tbd tbd
Thu	Jul-10	13.6	b b	100% 100%	20:45-00:30 00:30-04:15	0.0 / 3.8 0.0 / 3.8	0.5 0.5	tbd tbd
Fri	Jul-11	12.6	b b	98% 98%	20:45-00:29 00:29-04:15	0.0 / 3.7 0.0 / 3.8	0.5 0.5	tbd tbd
Sat	Jul-12	11.6	b b	94% 93%	20:44-00:30 00:30-04:16	0.0 / 3.8 0.0 / 3.8	0.5 0.5	tbd tbd
Sun	Jul-13	10.6	g b	87% 87%	20:44-00:31 00:31-04:17	0.6 / 3.8 0.0 / 3.8	0.5 0.5	tbd tbd
Mon	Jul-14	9.6	g b	79% 79%	20:43-00:30 00:30-04:18	1.1 / 3.8 0.0 / 3.8	0.5 0.5	tbd tbd
Tue	Jul-15	8.6	g g	69% 69%	20:42-00:30 00:30-04:18	1.5 / 3.8 0.0 / 3.8	0.5 0.5	tbd tbd
Wed	Jul-16	7.6	D g	58% 58%	20:42-00:31 00:31-04:19	2.0 / 3.8 0.0 / 3.8	0.5 0.5	tbd tbd
Thu	Jul-17	6.6	D g	47% 46%	20:41-00:31 00:31-04:20	2.5 / 3.8 0.0 / 3.8	0.5 0.5	tbd tbd
Fri	Jul-18	5.6	D g	35% 35%	20:40-00:30 00:30-04:21	3.1 / 3.8 0.0 / 3.9	0.5 0.5	tbd tbd
Sat	Jul-19	4.6	D D	0% 24%	20:40-00:31 00:31-04:22	3.2 / 3.9 0.6 / 3.9	0.5 0.5	tbd tbd
Sun	Jul-20	3.6	D D	0% 15%	20:39-00:31 00:31-04:23	3.2 / 3.9 1.4 / 3.9	0.5 0.5	tbd tbd
Mon	Jul-21	2.6	D D	0% 7%	20:38-00:31 00:31-04:23	3.2 / 3.9 2.4 / 3.9	0.5 0.5	tbd tbd
Tue	Jul-22	1.6	D D	0% 2%	20:37-00:31 00:31-04:24	3.3 / 3.9 3.3 / 3.9	0.5 0.5	tbd tbd
Wed	Jul-23	0.6	D D	0% 0%	20:37-00:31 00:31-04:25	3.3 / 3.9 3.3 / 3.9	0.5 0.5	tbd tbd
Thu	Jul-24	0.4	D D	0% 0%	20:36-00:31 00:31-04:26	3.3 / 3.9 3.3 / 3.9	0.5 0.5	tbd tbd
Fri	Jul-25	1.4	D D	0% 0%	20:35-00:31 00:31-04:27	3.3 / 3.9 3.3 / 3.9	0.5 0.5	tbd tbd
Sat	Jul-26	2.4	D D	6% 0%	20:34-00:31 00:31-04:28	3.3 / 4.0 3.4 / 4.0	0.5 0.5	tbd tbd
Sun	Jul-27	3.4	D D	12% 0%	20:33-00:31 00:31-04:29	3.1 / 4.0 3.4 / 4.0	0.5 0.5	tbd tbd
Mon	Jul-28	4.4	D D	20% 0%	20:32-00:31 00:31-04:30	2.7 / 4.0 3.4 / 4.0	0.5 0.5	tbd tbd
Tue	Jul-29	5.4	D D	28% 0%	20:31-00:31 00:31-04:31	2.3 / 4.0 3.4 / 4.0	0.5 0.5	tbd tbd
Wed	Jul-30	6.4	D D	37% 0%	20:30-00:30 00:30-04:32	1.9 / 4.0 3.5 / 4.0	0.5 0.5	tbd tbd
Thu	Jul-31	7.4	g D	47% 0%	20:29-00:31 00:31-04:32	1.5 / 4.0 3.5 / 4.0	0.5 0.5	tbd tbd

August 2025 - 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
Fri	Aug-01	8.4	g D	57% 0%	20:28-00:31 00:31-04:33	1.0 / 4.0 3.5 / 4.0	0.5 0.5	tbd tbd
Sat	Aug-02	9.4	g D	66% 0%	20:27-00:31 00:31-04:34	0.4 / 4.1 3.5 / 4.0	0.5 0.5	tbd tbd
Sun	Aug-03	10.4	b D	75% 75%	20:26-00:31 00:31-04:35	0.0 / 4.1 3.3 / 4.1	0.5 0.5	tbd tbd
Mon	Aug-04	11.4	b D	83% 83%	20:25-00:30 00:30-04:36	0.0 / 4.1 2.5 / 4.1	0.5 0.5	tbd tbd
Tue	Aug-05	12.4	b g	90% 90%	20:24-00:31 00:31-04:37	0.0 / 4.1 1.5 / 4.1	0.5 0.5	tbd tbd
Wed	Aug-06	13.4	b b	95% 96%	20:22-00:30 00:30-04:38	0.0 / 4.1 0.5 / 4.1	0.5 0.5	tbd tbd
Thu	Aug-07	14.4	b b	99% 99%	20:21-00:30 00:30-04:39	0.0 / 4.2 0.0 / 4.2	0.5 0.5	tbd tbd
Fri	Aug-08	13.9	b b	100% 100%	20:20-00:30 00:30-04:40	0.0 / 4.2 0.0 / 4.2	0.5 0.5	tbd tbd
Sat	Aug-09	12.9	b b	99% 99%	20:19-00:30 00:30-04:41	0.0 / 4.2 0.0 / 4.2	0.5 0.5	tbd tbd
Sun	Aug-10	11.9	b b	96% 95%	20:18-00:30 00:30-04:42	0.0 / 4.2 0.0 / 4.2	0.5 0.5	tbd tbd
Mon	Aug-11	10.9	b b	90% 89%	20:16-00:29 00:29-04:43	0.1 / 4.2 0.0 / 4.2	0.5 0.5	tbd tbd
Tue	Aug-12	9.9	g b	82% 81%	20:15-00:30 00:30-04:44	0.5 / 4.2 0.0 / 4.2	0.5 0.5	tbd tbd
Wed	Aug-13	8.9	g b	72% 71%	20:14-00:29 00:29-04:45	1.1 / 4.2 0.0 / 4.3	0.5 0.5	tbd tbd
Thu	Aug-14	7.9	g g	61% 60%	20:12-00:29 00:29-04:45	1.6 / 4.3 0.0 / 4.3	0.5 0.5	tbd tbd
Fri	Aug-15	6.9	D g	49% 48%	20:11-00:28 00:28-04:46	2.3 / 4.3 0.0 / 4.3	0.5 0.5	tbd tbd
Sat	Aug-16	5.9	D g	37% 37%	20:10-00:29 00:29-04:47	3.1 / 4.3 0.0 / 4.3	0.5 0.5	tbd tbd
Sun	Aug-17	4.9	D D	0% 26%	20:09-00:28 00:28-04:48	3.8 / 4.3 0.3 / 4.3	0.5 0.5	tbd tbd
Mon	Aug-18	3.9	D D	0% 17%	20:07-00:28 00:28-04:49	3.8 / 4.3 1.3 / 4.3	0.5 0.5	tbd tbd
Tue	Aug-19	2.9	D D	0% 9%	20:06-00:28 00:28-04:50	3.8 / 4.4 2.5 / 4.4	0.5 0.5	tbd tbd
Wed	Aug-20	1.9	D D	0% 3%	20:04-00:28 00:28-04:51	3.9 / 4.4 3.6 / 4.4	0.5 0.5	tbd tbd
Thu	Aug-21	0.9	D D	0% 0%	20:03-00:27 00:27-04:52	3.9 / 4.4 3.9 / 4.4	0.5 0.5	tbd tbd
Fri	Aug-22	0.1	D D	0% 0%	20:02-00:27 00:27-04:53	3.9 / 4.4 3.9 / 4.4	0.5 0.5	tbd tbd
Sat	Aug-23	1.1	D D	0% 0%	20:00-00:27 00:27-04:54	3.9 / 4.5 3.9 / 4.5	0.5 0.5	tbd tbd
Sun	Aug-24	2.1	D D	0% 0%	19:59-00:27 00:27-04:54	3.9 / 4.5 3.9 / 4.5	0.5 0.5	tbd tbd
Mon	Aug-25	3.1	D D	8% 0%	19:57-00:26 00:26-04:55	4.0 / 4.5 4.0 / 4.5	0.5 0.5	tbd tbd
Tue	Aug-26	4.1	D D	14% 0%	19:56-00:26 00:26-04:56	3.8 / 4.5 4.0 / 4.5	0.5 0.5	tbd tbd
Wed	Aug-27	5.1	D D	22% 0%	19:55-00:26 00:26-04:57	3.4 / 4.5 4.0 / 4.5	0.5 0.5	tbd tbd
Thu	Aug-28	6.1	D D	30% 0%	19:53-00:26 00:26-04:58	2.9 / 4.5 4.0 / 4.5	0.5 0.5	tbd tbd
Fri	Aug-29	7.1	D D	40% 0%	19:52-00:25 00:25-04:59	2.4 / 4.5 4.0 / 4.6	0.5 0.5	tbd tbd
Sat	Aug-30	8.1	g D	49% 0%	19:50-00:25 00:25-05:00	1.8 / 4.6 4.1 / 4.6	0.5 0.5	tbd tbd
Sun	Aug-31	9.1	g D	59% 0%	19:49-00:24 00:24-05:00	1.0 / 4.6 4.1 / 4.6	0.5 0.5	tbd tbd

September 2025 - 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
Mon	Sep-01	10.1	g D	69% 0%	19:47-00:25 00:25-05:01	0.1 / 4.6 4.1 / 4.6	0.5 0.5	tbd tbd
Tue	Sep-02	11.1	b D	78% 78%	19:46-00:24 00:24-05:02	0.0 / 4.6 3.3 / 4.6	0.5 0.5	tbd tbd
Wed	Sep-03	12.1	b g	86% 86%	19:44-00:24 00:24-05:03	0.0 / 4.7 2.2 / 4.7	0.5 0.5	tbd tbd
Thu	Sep-04	13.1	b g	92% 93%	19:43-00:23 00:23-05:04	0.0 / 4.7 1.1 / 4.7	0.5 0.5	tbd tbd
Fri	Sep-05	14.1	b b	97% 98%	19:41-00:23 00:23-05:05	0.0 / 4.7 0.0 / 4.7	0.5 0.5	tbd tbd
Sat	Sep-06	14.4	b b	100% 100%	19:40-00:22 00:22-05:05	0.0 / 4.7 0.0 / 4.7	0.5 0.5	tbd tbd
Sun	Sep-07	13.4	b b	100% 100%	19:38-00:23 00:23-05:06	0.0 / 4.8 0.0 / 4.7	0.5 0.5	tbd tbd
Mon	Sep-08	12.4	b b	97% 97%	19:37-00:22 00:22-05:07	0.0 / 4.8 0.0 / 4.8	0.5 0.5	tbd tbd
Tue	Sep-09	11.4	b b	92% 91%	19:35-00:22 00:22-05:08	0.0 / 4.8 0.0 / 4.8	0.5 0.5	tbd tbd
Wed	Sep-10	10.4	g b	84% 83%	19:34-00:21 00:21-05:09	0.3 / 4.8 0.0 / 4.8	0.5 0.5	tbd tbd
Thu	Sep-11	9.4	g b	75% 73%	19:32-00:21 00:21-05:09	1.0 / 4.8 0.0 / 4.8	0.5 0.5	tbd tbd
Fri	Sep-12	8.4	g g	64% 62%	19:31-00:20 00:20-05:10	1.8 / 4.8 0.0 / 4.8	0.5 0.5	tbd tbd
Sat	Sep-13	7.4	D g	52% 51%	19:29-00:20 00:20-05:11	2.6 / 4.8 0.0 / 4.8	0.5 0.5	tbd tbd
Sun	Sep-14	6.4	D g	40% 40%	19:28-00:20 00:20-05:12	3.7 / 4.9 0.0 / 4.9	0.5 0.5	tbd tbd
Mon	Sep-15	5.5	D g	0% 29%	19:26-00:19 00:19-05:13	4.4 / 4.9 0.5 / 4.9	0.5 0.5	tbd tbd
Tue	Sep-16	4.5	D D	0% 19%	19:25-00:19 00:19-05:13	4.4 / 4.9 1.6 / 4.9	0.5 0.5	tbd tbd
Wed	Sep-17	3.5	D D	0% 11%	19:23-00:19 00:19-05:14	4.4 / 4.9 2.7 / 4.9	0.5 0.5	tbd tbd
Thu	Sep-18	2.5	D D	0% 5%	19:22-00:19 00:19-05:15	4.5 / 5.0 3.8 / 4.9	0.5 0.5	tbd tbd
Fri	Sep-19	1.5	D D	0% 2%	19:20-00:18 00:18-05:16	4.5 / 5.0 4.5 / 5.0	0.5 0.5	tbd tbd
Sat	Sep-20	0.5	D D	0% 0%	19:19-00:18 00:18-05:16	4.5 / 5.0 4.5 / 5.0	0.5 0.5	tbd tbd
Sun	Sep-21	0.5	D D	0% 0%	19:17-00:17 00:17-05:17	4.5 / 5.0 4.5 / 5.0	0.5 0.5	tbd tbd
Mon	Sep-22	1.5	D D	0% 0%	19:16-00:17 00:17-05:18	4.5 / 5.0 4.5 / 5.0	0.5 0.5	tbd tbd
Tue	Sep-23	2.5	D D	0% 0%	19:14-00:16 00:16-05:19	4.5 / 5.0 4.6 / 5.0	0.5 0.5	tbd tbd
Wed	Sep-24	3.5	D D	10% 0%	19:13-00:17 00:17-05:19	4.6 / 5.1 4.6 / 5.0	0.5 0.5	tbd tbd
Thu	Sep-25	4.5	D D	16% 0%	19:12-00:16 00:16-05:20	4.2 / 5.1 4.6 / 5.1	0.5 0.5	tbd tbd
Fri	Sep-26	5.5	D D	24% 0%	19:10-00:16 00:16-05:21	3.7 / 5.1 4.6 / 5.1	0.5 0.5	tbd tbd
Sat	Sep-27	6.5	D D	32% 0%	19:09-00:15 00:15-05:22	3.0 / 5.1 4.6 / 5.1	0.5 0.5	tbd tbd
Sun	Sep-28	7.5	D D	42% 0%	19:07-00:15 00:15-05:23	2.1 / 5.1 4.7 / 5.1	0.5 0.5	tbd tbd
Mon	Sep-29	8.5	g D	52% 0%	19:06-00:15 00:15-05:23	1.2 / 5.2 4.7 / 5.1	0.5 0.5	tbd tbd
Tue	Sep-30	9.5	g D	62% 0%	19:04-00:14 00:14-05:24	0.2 / 5.2 4.7 / 5.2	0.5 0.5	tbd tbd

October 2025 - 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	Oct-01	10.5	b D	72% 72%	19:03-00:14 00:14-05:25	0.0 / 5.2 3.8 / 5.2	0.5 0.5	tbd tbd
Thu	Oct-02	11.5	b g	81% 82%	19:02-00:13 00:13-05:26	0.0 / 5.2 2.7 / 5.2	0.5 0.5	tbd tbd
Fri	Oct-03	12.5	b g	89% 90%	19:00-00:14 00:14-05:26	0.0 / 5.2 1.6 / 5.2	0.5 0.5	tbd tbd
Sat	Oct-04	13.5	b b	95% 96%	18:59-00:13 00:13-05:27	0.0 / 5.2 0.5 / 5.2	0.5 0.5	tbd tbd
Sun	Oct-05	14.5	b b	99% 99%	18:58-00:13 00:13-05:28	0.0 / 5.2 0.0 / 5.2	0.5 0.5	tbd tbd
Mon	Oct-06	14.1	b b	100% 100%	18:56-00:12 00:12-05:29	0.0 / 5.3 0.0 / 5.3	0.5 0.5	tbd tbd
Tue	Oct-07	13.1	b b	99% 98%	18:55-00:12 00:12-05:29	0.0 / 5.3 0.0 / 5.3	0.5 0.5	tbd tbd
Wed	Oct-08	12.1	b b	94% 93%	18:54-00:12 00:12-05:30	0.0 / 5.3 0.0 / 5.3	0.5 0.5	tbd tbd
Thu	Oct-09	11.1	b b	87% 86%	18:52-00:12 00:12-05:31	0.3 / 5.3 0.0 / 5.3	0.5 0.5	tbd tbd
Fri	Oct-10	10.1	g b	78% 76%	18:51-00:11 00:11-05:32	1.2 / 5.3 0.0 / 5.3	0.5 0.5	tbd tbd
Sat	Oct-11	9.1	g g	67% 65%	18:50-00:11 00:11-05:32	2.2 / 5.3 0.0 / 5.3	0.5 0.5	tbd tbd
Sun	Oct-12	8.1	D g	55% 54%	18:48-00:11 00:11-05:33	3.3 / 5.4 0.0 / 5.4	0.5 0.5	tbd tbd
Mon	Oct-13	7.1	D g	44% 43%	18:47-00:10 00:10-05:34	4.5 / 5.4 0.0 / 5.4	0.5 0.5	tbd tbd
Tue	Oct-14	6.1	D g	0% 33%	18:46-00:11 00:11-05:35	4.9 / 5.4 0.7 / 5.4	0.5 0.5	tbd tbd
Wed	Oct-15	5.1	D D	0% 23%	18:45-00:10 00:10-05:36	4.9 / 5.4 1.8 / 5.4	0.5 0.5	tbd tbd
Thu	Oct-16	4.1	D D	0% 15%	18:43-00:10 00:10-05:36	5.0 / 5.5 2.8 / 5.4	0.5 0.5	tbd tbd
Fri	Oct-17	3.1	D D	0% 8%	18:42-00:09 00:09-05:37	5.0 / 5.5 3.8 / 5.5	0.5 0.5	tbd tbd
Sat	Oct-18	2.1	D D	0% 3%	18:41-00:10 00:10-05:38	5.0 / 5.5 4.8 / 5.5	0.5 0.5	tbd tbd
Sun	Oct-19	1.1	D D	0% 0%	18:40-00:09 00:09-05:39	5.0 / 5.5 5.0 / 5.5	0.5 0.5	tbd tbd
Mon	Oct-20	0.1	D D	0% 0%	18:39-00:10 00:10-05:40	5.0 / 5.5 5.0 / 5.5	0.5 0.5	tbd tbd
Tue	Oct-21	0.9	D D	0% 0%	18:38-00:09 00:09-05:40	5.0 / 5.5 5.0 / 5.5	0.5 0.5	tbd tbd
Wed	Oct-22	1.9	D D	0% 0%	18:37-00:09 00:09-05:41	5.0 / 5.5 5.1 / 5.5	0.5 0.5	tbd tbd
Thu	Oct-23	2.9	D D	6% 0%	18:35-00:08 00:08-05:42	5.0 / 5.5 5.1 / 5.6	0.5 0.5	tbd tbd
Fri	Oct-24	3.9	D D	11% 0%	18:34-00:09 00:09-05:43	4.9 / 5.6 5.1 / 5.6	0.5 0.5	tbd tbd
Sat	Oct-25	4.9	D D	18% 0%	18:33-00:08 00:08-05:44	4.1 / 5.6 5.1 / 5.6	0.5 0.5	tbd tbd
Sun	Oct-26	5.9	D D	26% 0%	18:32-00:09 00:09-05:44	3.2 / 5.6 5.1 / 5.6	0.5 0.5	tbd tbd
Mon	Oct-27	6.9	D D	35% 0%	18:31-00:08 00:08-05:45	2.3 / 5.6 5.2 / 5.6	0.5 0.5	tbd tbd
Tue	Oct-28	7.9	g D	45% 0%	18:30-00:09 00:09-05:46	1.2 / 5.7 5.2 / 5.6	0.5 0.5	tbd tbd
Wed	Oct-29	8.9	g D	55% 0%	18:29-00:08 00:08-05:47	0.2 / 5.7 5.2 / 5.7	0.5 0.5	tbd tbd
Thu	Oct-30	9.9	g D	66% 66%	18:29-00:09 00:09-05:48	0.0 / 5.7 4.2 / 5.7	0.5 0.5	tbd tbd
Fri	Oct-31	10.9	b g	76% 76%	18:28-00:08 00:08-05:49	0.0 / 5.7 3.2 / 5.7	0.5 0.5	tbd tbd

November 2025 - 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	Nov-01	11.9	b g	85% 86%	18:27-00:09 00:09-05:49	0.0 / 5.7 2.0 / 5.7	0.5 0.5	tbd tbd
Sun	Nov-02	12.9	b b	92% 93%	18:26-00:08 00:08-05:50	0.0 / 5.7 0.9 / 5.7	0.5 0.5	tbd tbd
Mon	Nov-03	13.9	b b	97% 98%	18:25-00:09 00:09-05:51	0.0 / 5.7 0.0 / 5.7	0.5 0.5	tbd tbd
Tue	Nov-04	14.9	b b	100% 100%	18:24-00:08 00:08-05:52	0.0 / 5.7 0.0 / 5.7	0.5 0.5	tbd tbd
Wed	Nov-05	14.0	b b	99% 99%	18:23-00:08 00:08-05:53	0.0 / 5.8 0.0 / 5.8	0.5 0.5	tbd tbd
Thu	Nov-06	13.0	b b	96% 95%	18:23-00:08 00:08-05:54	0.0 / 5.8 0.0 / 5.8	0.5 0.5	tbd tbd
Fri	Nov-07	12.0	b b	90% 88%	18:22-00:08 00:08-05:54	0.4 / 5.8 0.0 / 5.8	0.5 0.5	tbd tbd
Sat	Nov-08	11.0	g b	81% 80%	18:21-00:08 00:08-05:55	1.5 / 5.8 0.0 / 5.8	0.5 0.5	tbd tbd
Sun	Nov-09	10.0	g g	71% 70%	18:20-00:08 00:08-05:56	2.7 / 5.8 0.0 / 5.8	0.5 0.5	tbd tbd
Mon	Nov-10	9.0	D g	60% 59%	18:20-00:09 00:09-05:57	3.9 / 5.8 0.0 / 5.8	0.5 0.5	tbd tbd
Tue	Nov-11	8.0	D g	49% 48%	18:19-00:08 00:08-05:58	5.0 / 5.8 0.0 / 5.8	0.5 0.5	tbd tbd
Wed	Nov-12	7.0	D g	0% 38%	18:19-00:09 00:09-05:59	5.3 / 5.8 0.8 / 5.8	0.5 0.5	tbd tbd
Thu	Nov-13	6.0	D D	0% 28%	18:18-00:09 00:09-06:00	5.3 / 5.8 1.7 / 5.8	0.5 0.5	tbd tbd
Fri	Nov-14	5.0	D D	0% 19%	18:17-00:09 00:09-06:00	5.4 / 5.9 2.7 / 5.8	0.5 0.5	tbd tbd
Sat	Nov-15	4.0	D D	0% 12%	18:17-00:09 00:09-06:01	5.4 / 5.9 3.6 / 5.9	0.5 0.5	tbd tbd
Sun	Nov-16	3.0	D D	0% 7%	18:16-00:09 00:09-06:02	5.4 / 5.9 4.6 / 5.9	0.5 0.5	tbd tbd
Mon	Nov-17	2.0	D D	0% 3%	18:16-00:10 00:10-06:03	5.4 / 5.9 5.4 / 5.9	0.5 0.5	tbd tbd
Tue	Nov-18	1.0	D D	0% 0%	18:16-00:10 00:10-06:04	5.4 / 5.9 5.4 / 5.9	0.5 0.5	tbd tbd
Wed	Nov-19	0.0	D D	0% 0%	18:15-00:10 00:10-06:05	5.4 / 5.9 5.4 / 5.9	0.5 0.5	tbd tbd
Thu	Nov-20	1.0	D D	0% 0%	18:15-00:11 00:11-06:06	5.4 / 5.9 5.4 / 5.9	0.5 0.5	tbd tbd
Fri	Nov-21	2.0	D D	0% 0%	18:14-00:10 00:10-06:07	5.4 / 5.9 5.5 / 6.0	0.5 0.5	tbd tbd
Sat	Nov-22	3.0	D D	7% 0%	18:14-00:11 00:11-06:07	5.4 / 6.0 5.5 / 5.9	0.5 0.5	tbd tbd
Sun	Nov-23	4.0	D D	13% 0%	18:14-00:11 00:11-06:08	4.4 / 6.0 5.5 / 6.0	0.5 0.5	tbd tbd
Mon	Nov-24	5.0	D D	20% 0%	18:14-00:11 00:11-06:09	3.4 / 6.0 5.5 / 6.0	0.5 0.5	tbd tbd
Tue	Nov-25	6.0	D D	29% 0%	18:13-00:12 00:12-06:10	2.4 / 6.0 5.5 / 6.0	0.5 0.5	tbd tbd
Wed	Nov-26	7.0	g D	38% 0%	18:13-00:12 00:12-06:11	1.3 / 6.0 5.5 / 6.0	0.5 0.5	tbd tbd
Thu	Nov-27	8.0	g D	49% 0%	18:13-00:12 00:12-06:12	0.3 / 6.0 5.5 / 6.0	0.5 0.5	tbd tbd
Fri	Nov-28	9.0	g D	60% 60%	18:13-00:13 00:13-06:12	0.0 / 6.0 4.7 / 6.0	0.5 0.5	tbd tbd
Sat	Nov-29	10.0	g D	71% 71%	18:13-00:13 00:13-06:13	0.0 / 6.0 3.6 / 6.0	0.5 0.5	tbd tbd
Sun	Nov-30	11.0	b g	81% 82%	18:13-00:13 00:13-06:14	0.0 / 6.0 2.5 / 6.0	0.5 0.5	tbd tbd

December 2025 - 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
Mon	Dec-01	12.0	b g	89% 90%	18:13-00:13 00:13-06:15	0.0 / 6.0 1.3 / 6.0	0.5 0.5	tbd tbd
Tue	Dec-02	13.0	b b	95% 96%	18:13-00:14 00:14-06:16	0.0 / 6.0 0.0 / 6.0	0.5 0.5	tbd tbd
Wed	Dec-03	14.0	b b	99% 99%	18:13-00:15 00:15-06:16	0.0 / 6.0 0.0 / 6.0	0.5 0.5	tbd tbd
Thu	Dec-04	14.9	b b	100% 100%	18:13-00:15 00:15-06:17	0.0 / 6.0 0.0 / 6.0	0.5 0.5	tbd tbd
Fri	Dec-05	13.9	b b	98% 97%	18:13-00:15 00:15-06:18	0.0 / 6.0 0.0 / 6.0	0.5 0.5	tbd tbd
Sat	Dec-06	12.9	b b	93% 92%	18:13-00:15 00:15-06:19	0.5 / 6.0 0.0 / 6.1	0.5 0.5	tbd tbd
Sun	Dec-07	11.9	g b	85% 84%	18:13-00:16 00:16-06:19	1.7 / 6.0 0.0 / 6.0	0.5 0.5	tbd tbd
Mon	Dec-08	10.9	g b	76% 75%	18:13-00:17 00:17-06:20	2.9 / 6.1 0.0 / 6.0	0.5 0.5	tbd tbd
Tue	Dec-09	9.9	D g	66% 65%	18:13-00:17 00:17-06:21	4.0 / 6.1 0.0 / 6.1	0.5 0.5	tbd tbd
Wed	Dec-10	8.9	D g	55% 55%	18:13-00:17 00:17-06:21	5.0 / 6.1 0.0 / 6.1	0.5 0.5	tbd tbd
Thu	Dec-11	7.9	D g	0% 45%	18:14-00:18 00:18-06:22	5.6 / 6.1 0.4 / 6.1	0.5 0.5	tbd tbd
Fri	Dec-12	6.9	D g	0% 35%	18:14-00:18 00:18-06:23	5.5 / 6.1 1.4 / 6.1	0.5 0.5	tbd tbd
Sat	Dec-13	5.9	D D	0% 26%	18:14-00:19 00:19-06:23	5.6 / 6.1 2.3 / 6.1	0.5 0.5	tbd tbd
Sun	Dec-14	4.9	D D	0% 18%	18:14-00:19 00:19-06:24	5.6 / 6.1 3.3 / 6.1	0.5 0.5	tbd tbd
Mon	Dec-15	3.9	D D	0% 11%	18:15-00:20 00:20-06:25	5.6 / 6.1 4.3 / 6.1	0.5 0.5	tbd tbd
Tue	Dec-16	2.9	D D	0% 6%	18:15-00:21 00:21-06:25	5.6 / 6.1 5.2 / 6.1	0.5 0.5	tbd tbd
Wed	Dec-17	1.9	D D	0% 0%	18:16-00:21 00:21-06:26	5.6 / 6.1 5.6 / 6.1	0.5 0.5	tbd tbd
Thu	Dec-18	0.9	D D	0% 0%	18:16-00:22 00:22-06:26	5.6 / 6.1 5.6 / 6.1	0.5 0.5	tbd tbd
Fri	Dec-19	0.1	D D	0% 0%	18:16-00:22 00:22-06:27	5.6 / 6.1 5.6 / 6.1	0.5 0.5	tbd tbd
Sat	Dec-20	1.1	D D	0% 0%	18:17-00:23 00:23-06:28	5.6 / 6.1 5.6 / 6.1	0.5 0.5	tbd tbd
Sun	Dec-21	2.1	D D	4% 0%	18:17-00:23 00:23-06:28	5.6 / 6.1 5.6 / 6.1	0.5 0.5	tbd tbd
Mon	Dec-22	3.1	D D	8% 0%	18:18-00:24 00:24-06:28	4.7 / 6.1 5.6 / 6.1	0.5 0.5	tbd tbd
Tue	Dec-23	4.1	D D	15% 0%	18:18-00:24 00:24-06:29	3.6 / 6.1 5.6 / 6.1	0.5 0.5	tbd tbd
Wed	Dec-24	5.1	D D	23% 0%	18:19-00:25 00:25-06:29	2.6 / 6.1 5.6 / 6.1	0.5 0.5	tbd tbd
Thu	Dec-25	6.1	D D	33% 0%	18:20-00:25 00:25-06:30	1.6 / 6.1 5.6 / 6.1	0.5 0.5	tbd tbd
Fri	Dec-26	7.1	g D	44% 0%	18:20-00:25 00:25-06:30	0.5 / 6.1 5.6 / 6.1	0.5 0.5	tbd tbd
Sat	Dec-27	8.1	g D	55% 55%	18:21-00:26 00:26-06:31	0.0 / 6.1 5.0 / 6.1	0.5 0.5	tbd tbd
Sun	Dec-28	9.1	g D	66% 67%	18:21-00:26 00:26-06:31	0.0 / 6.1 3.9 / 6.1	0.5 0.5	tbd tbd
Mon	Dec-29	10.1	b g	76% 78%	18:22-00:26 00:26-06:31	0.0 / 6.1 2.7 / 6.1	0.5 0.5	tbd tbd
Tue	Dec-30	11.1	b g	86% 87%	18:23-00:27 00:27-06:31	0.0 / 6.1 1.4 / 6.1	0.5 0.5	tbd tbd
Wed	Dec-31	12.1	b b	93% 94%	18:23-00:27 00:27-06:32	0.0 / 6.1 0.2 / 6.1	0.5 0.5	tbd tbd

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, NL=Joint NAU/Lowell, T=UToledo, 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.

2025B Approved Target of Opportunity (ToO) Programs
Program ID	Principal	ToO Type	Time Allocated (hours)	Time Remaining (hours)	Requested Instrument & Filters/Grating
Totals			0.00	0.00

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@
    Jose Fernandez (LDTNtOpsMgr) JF; jfernandez@
    Robert Gallagher (Safety) RG; rgallagher@
    Hayden Green (Safety) HG; hgreen@
    Daniel Hiel (Safety) DH; dhiel@
    Kyler Kuehn (DirTech) KK; kkuehn@
    Vladimir Lee (Safety) VL; vlee@
    Stephen Levine (Ast/TelSci/DirEd) SL; sel@
    Beck Maier (TelOp) BM; emaier@
    Ishara Nisley (TelOp) IN; inisley@
    Observer (Observer) OBS;
    Ben Shafransky (TelOp) BS; bshafransky@
    Cecilia Siqueiros (TelOp) CS; csiqueiros@
    Visitor (Visitor) VST;

Summary of dates on which approved programs are scheduled (note some dates are partial nights):
tbd                    2025-07-01, 2025-07-02, 2025-07-03, 2025-07-04, 2025-07-05, 2025-07-06
                       2025-07-07, 2025-07-08, 2025-07-09, 2025-07-10, 2025-07-11, 2025-07-12
                       2025-07-13, 2025-07-14, 2025-07-15, 2025-07-16, 2025-07-17, 2025-07-18
                       2025-07-19, 2025-07-20, 2025-07-21, 2025-07-22, 2025-07-23, 2025-07-24
                       2025-07-25, 2025-07-26, 2025-07-27, 2025-07-28, 2025-07-29, 2025-07-30
                       2025-07-31, 2025-08-01, 2025-08-02, 2025-08-03, 2025-08-04, 2025-08-05
                       2025-08-06, 2025-08-07, 2025-08-08, 2025-08-09, 2025-08-10, 2025-08-11
                       2025-08-12, 2025-08-13, 2025-08-14, 2025-08-15, 2025-08-16, 2025-08-17
                       2025-08-18, 2025-08-19, 2025-08-20, 2025-08-21, 2025-08-22, 2025-08-23
                       2025-08-24, 2025-08-25, 2025-08-26, 2025-08-27, 2025-08-28, 2025-08-29
                       2025-08-30, 2025-08-31, 2025-09-01, 2025-09-02, 2025-09-03, 2025-09-04
                       2025-09-05, 2025-09-06, 2025-09-07, 2025-09-08, 2025-09-09, 2025-09-10
                       2025-09-11, 2025-09-12, 2025-09-13, 2025-09-14, 2025-09-15, 2025-09-16
                       2025-09-17, 2025-09-18, 2025-09-19, 2025-09-20, 2025-09-21, 2025-09-22
                       2025-09-23, 2025-09-24, 2025-09-25, 2025-09-26, 2025-09-27, 2025-09-28
                       2025-09-29, 2025-09-30, 2025-10-01, 2025-10-02, 2025-10-03, 2025-10-04
                       2025-10-05, 2025-10-06, 2025-10-07, 2025-10-08, 2025-10-09, 2025-10-10
                       2025-10-11, 2025-10-12, 2025-10-13, 2025-10-14, 2025-10-15, 2025-10-16
                       2025-10-17, 2025-10-18, 2025-10-19, 2025-10-20, 2025-10-21, 2025-10-22
                       2025-10-23, 2025-10-24, 2025-10-25, 2025-10-26, 2025-10-27, 2025-10-28
                       2025-10-29, 2025-10-30, 2025-10-31, 2025-11-01, 2025-11-02, 2025-11-03
                       2025-11-04, 2025-11-05, 2025-11-06, 2025-11-07, 2025-11-08, 2025-11-09
                       2025-11-10, 2025-11-11, 2025-11-12, 2025-11-13, 2025-11-14, 2025-11-15
                       2025-11-16, 2025-11-17, 2025-11-18, 2025-11-19, 2025-11-20, 2025-11-21
                       2025-11-22, 2025-11-23, 2025-11-24, 2025-11-25, 2025-11-26, 2025-11-27
                       2025-11-28, 2025-11-29, 2025-11-30, 2025-12-01, 2025-12-02, 2025-12-03
                       2025-12-04, 2025-12-05, 2025-12-06, 2025-12-07, 2025-12-08, 2025-12-09
                       2025-12-10, 2025-12-11, 2025-12-12, 2025-12-13, 2025-12-14, 2025-12-15
                       2025-12-16, 2025-12-17, 2025-12-18, 2025-12-19, 2025-12-20, 2025-12-21
                       2025-12-22, 2025-12-23, 2025-12-24, 2025-12-25, 2025-12-26, 2025-12-27
                       2025-12-28, 2025-12-29, 2025-12-30, 2025-12-31


ID  PI Name            Title
tbd

Latest as of 2025-02-13T19:59:08.676639 UTC