March 2012 (Gregorian)

Twilight and Astronomy Information

Greenwich Observatory, UK: 51.4778°N, 0°E, elevation 46.9m, time zone UT (Standard Time)

Date	Start of Twilight			Sun Rise	Rise Az ° S-E+N	Mid Day	° Sun Long	EoT	Day Span	Day Hour	Set Az ° S-W+N	Sun Set	° Moon Phase	End of Twilight			Mid- Night	Night Span	Night Hour
	Astro	Sea	Civil											Civil	Sea	Astro
1 Thu	04:54	05:32	06:11	06:43	-11.94	12:12	341.3	-12.3	11:00	0:55	-11.66	17:42	+97.5	18:14	18:53	19:32	00:12	12:58	1:05
2 Fri	04:52	05:30	06:09	06:41	-11.32	12:12	342.3	-12.0	11:03	0:55	-11.04	17:44	+108.8	18:16	18:55	19:34	00:12	12:54	1:05
3 Sat	04:49	05:28	06:07	06:39	-10.70	12:12	343.3	-11.8	11:07	0:56	-10.42	17:46	+120.4	18:18	18:57	19:36	00:12	12:50	1:04
4 Sun	04:47	05:26	06:05	06:36	-10.08	12:12	344.3	-11.6	11:11	0:56	-9.79	17:48	+132.4	18:20	18:58	19:37	00:12	12:47	1:04
5 Mon	04:45	05:24	06:02	06:34	-9.46	12:11	345.3	-11.4	11:15	0:56	-9.16	17:49	+144.9	18:21	19:00	19:39	00:11	12:43	1:04
6 Tue	04:43	05:22	06:00	06:32	-8.83	12:11	346.3	-11.2	11:19	0:57	-8.53	17:51	+157.8	18:23	19:02	19:41	00:11	12:39	1:03
7 Wed	04:40	05:20	05:58	06:30	-8.20	12:11	347.3	-10.9	11:23	0:57	-7.90	17:53	+171.1	18:25	19:03	19:43	00:11	12:35	1:03
8 Thu	04:38	05:17	05:56	06:28	-7.57	12:11	348.3	-10.7	11:27	0:57	-7.27	17:55	-175.3	18:26	19:05	19:45	00:11	12:31	1:03
9 Fri	04:36	05:15	05:54	06:25	-6.94	12:10	349.3	-10.4	11:31	0:58	-6.64	17:56	-161.5	18:28	19:07	19:46	00:10	12:27	1:02
10 Sat	04:33	05:13	05:51	06:23	-6.31	12:10	350.3	-10.1	11:35	0:58	-6.01	17:58	-147.6	18:30	19:09	19:48	00:10	12:23	1:02
11 Sun	04:31	05:11	05:49	06:21	-5.68	12:10	351.3	-9.9	11:39	0:58	-5.38	18:00	-133.8	18:32	19:10	19:50	00:10	12:19	1:02
12 Mon	04:29	05:08	05:47	06:19	-5.05	12:10	352.3	-9.6	11:43	0:59	-4.74	18:02	-120.3	18:33	19:12	19:52	00:09	12:15	1:01
13 Tue	04:26	05:06	05:45	06:16	-4.42	12:09	353.3	-9.3	11:47	0:59	-4.11	18:03	-106.9	18:35	19:14	19:54	00:09	12:11	1:01
14 Wed	04:24	05:04	05:42	06:14	-3.78	12:09	354.3	-9.1	11:51	0:59	-3.47	18:05	-93.9	18:37	19:16	19:56	00:09	12:07	1:01
15 Thu	04:21	05:01	05:40	06:12	-3.15	12:09	355.3	-8.8	11:55	1:00	-2.84	18:07	-81.2	18:38	19:17	19:58	00:09	12:03	1:00
16 Fri	04:19	04:59	05:38	06:10	-2.51	12:08	356.3	-8.5	11:59	1:00	-2.20	18:08	-68.7	18:40	19:19	20:00	00:08	11:59	1:00
17 Sat	04:16	04:57	05:36	06:07	-1.88	12:08	357.3	-8.2	12:03	1:00	-1.56	18:10	-56.5	18:42	19:21	20:02	00:08	11:55	1:00
18 Sun	04:14	04:54	05:33	06:05	-1.25	12:08	358.3	-7.9	12:07	1:01	-0.93	18:12	-44.5	18:44	19:23	20:04	00:08	11:51	0:59
19 Mon	04:11	04:52	05:31	06:03	-0.61	12:08	359.3	-7.6	12:11	1:01	-0.29	18:13	-32.6	18:45	19:25	20:06	00:07	11:47	0:59
20 Tue	04:09	04:49	05:29	06:01	+0.02	12:07	0.3	-7.3	12:15	1:01	+0.34	18:15	-21.0	18:47	19:26	20:08	00:07	11:43	0:59
21 Wed	04:06	04:47	05:26	05:58	+0.65	12:07	1.3	-7.0	12:19	1:02	+0.98	18:17	-9.6	18:49	19:28	20:10	00:07	11:39	0:58
22 Thu	04:03	04:45	05:24	05:56	+1.29	12:07	2.3	-6.7	12:23	1:02	+1.61	18:19	+1.7	18:50	19:30	20:12	00:07	11:35	0:58
23 Fri	04:01	04:42	05:22	05:54	+1.92	12:06	3.3	-6.4	12:27	1:02	+2.25	18:20	+12.8	18:52	19:32	20:14	00:06	11:31	0:58
24 Sat	03:58	04:40	05:19	05:51	+2.55	12:06	4.3	-6.1	12:31	1:03	+2.88	18:22	+23.8	18:54	19:34	20:16	00:06	11:27	0:57
25 Sun	03:55	04:37	05:17	05:49	+3.18	12:06	5.2	-5.8	12:34	1:03	+3.51	18:24	+34.7	18:56	19:36	20:18	00:06	11:23	0:57
26 Mon	03:53	04:35	05:15	05:47	+3.81	12:06	6.2	-5.5	12:38	1:03	+4.14	18:25	+45.5	18:57	19:38	20:20	00:05	11:19	0:57
27 Tue	03:50	04:32	05:12	05:45	+4.44	12:05	7.2	-5.2	12:42	1:04	+4.77	18:27	+56.3	18:59	19:39	20:22	00:05	11:15	0:56
28 Wed	03:47	04:30	05:10	05:42	+5.07	12:05	8.2	-4.9	12:46	1:04	+5.40	18:29	+67.2	19:01	19:41	20:24	00:05	11:11	0:56
29 Thu	03:45	04:27	05:08	05:40	+5.70	12:05	9.2	-4.6	12:50	1:04	+6.03	18:30	+78.2	19:03	19:43	20:26	00:04	11:07	0:56
30 Fri	03:42	04:25	05:05	05:38	+6.32	12:04	10.2	-4.3	12:54	1:05	+6.66	18:32	+89.5	19:04	19:45	20:29	00:04	11:03	0:55
31 Sat	03:39	04:22	05:03	05:35	+6.94	12:04	11.2	-4.0	12:58	1:05	+7.28	18:34	+101.0	19:06	19:47	20:31	00:04	11:00	0:55

° Solar Longitude [Sun Long] and Equation of Time [EoT, in minutes] are as of Mid Day = Local Apparent Noon.
° Sunrise/Sunset Azimuth [Rise/Set Az] relative to true east/west with center of Sun at horizon. Moon Phase at Sunset.

Note Twilight Solar Depressions: Civil = 6° (see brightest stars, aviation end or start of night, then artificial lights for outdoor activities),
Nautical [Sea] = 12° (horizon no longer visible at sea), Astronomical [Astro] = 18° (minimal atmospheric scatter of sunlight).

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