December 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 Sat	05:42	06:22	07:05	07:42	-36.75	11:49	249.7	+10.8	08:14	0:41	-36.84	15:56	-147.0	16:33	17:16	17:56	23:49	15:47	1:19
2 Sun	05:43	06:24	07:06	07:43	-37.02	11:50	250.7	+10.4	08:12	0:41	-37.11	15:56	-135.9	16:33	17:15	17:56	23:50	15:49	1:19
3 Mon	05:44	06:25	07:07	07:45	-37.29	11:50	251.7	+10.0	08:11	0:41	-37.37	15:55	-124.8	16:33	17:15	17:55	23:50	15:51	1:19
4 Tue	05:45	06:26	07:08	07:46	-37.54	11:50	252.7	+9.6	08:09	0:41	-37.62	15:55	-113.4	16:32	17:15	17:55	23:51	15:53	1:19
5 Wed	05:46	06:27	07:09	07:47	-37.78	11:51	253.8	+9.2	08:07	0:41	-37.85	15:54	-101.8	16:32	17:14	17:55	23:51	15:54	1:20
6 Thu	05:47	06:28	07:11	07:48	-38.00	11:51	254.8	+8.8	08:05	0:40	-38.07	15:54	-89.8	16:32	17:14	17:55	23:51	15:56	1:20
7 Fri	05:48	06:29	07:12	07:50	-38.21	11:52	255.8	+8.3	08:04	0:40	-38.28	15:54	-77.5	16:31	17:14	17:55	23:52	15:57	1:20
8 Sat	05:49	06:30	07:13	07:51	-38.41	11:52	256.8	+7.9	08:03	0:40	-38.48	15:53	-64.7	16:31	17:14	17:55	23:52	15:58	1:20
9 Sun	05:50	06:31	07:14	07:52	-38.60	11:53	257.8	+7.5	08:01	0:40	-38.66	15:53	-51.6	16:31	17:14	17:54	23:53	16:00	1:20
10 Mon	05:51	06:32	07:15	07:53	-38.77	11:53	258.8	+7.0	08:00	0:40	-38.82	15:53	-38.0	16:31	17:14	17:54	23:53	16:01	1:20
11 Tue	05:52	06:33	07:16	07:54	-38.93	11:53	259.9	+6.5	07:59	0:40	-38.97	15:53	-24.1	16:31	17:14	17:55	23:54	16:02	1:20
12 Wed	05:53	06:34	07:17	07:55	-39.07	11:54	260.9	+6.1	07:58	0:40	-39.11	15:53	-10.0	16:31	17:14	17:55	23:54	16:03	1:20
13 Thu	05:54	06:35	07:18	07:56	-39.20	11:54	261.9	+5.6	07:57	0:40	-39.23	15:53	+4.3	16:31	17:14	17:55	23:55	16:04	1:20
14 Fri	05:55	06:35	07:18	07:57	-39.31	11:55	262.9	+5.1	07:56	0:40	-39.34	15:53	+18.4	16:31	17:14	17:55	23:55	16:05	1:20
15 Sat	05:55	06:36	07:19	07:57	-39.41	11:55	263.9	+4.6	07:56	0:40	-39.44	15:53	+32.2	16:31	17:15	17:55	23:56	16:05	1:20
16 Sun	05:56	06:37	07:20	07:58	-39.49	11:56	264.9	+4.2	07:55	0:40	-39.52	15:53	+45.7	16:32	17:15	17:56	23:56	16:06	1:20
17 Mon	05:57	06:37	07:21	07:59	-39.56	11:56	266.0	+3.7	07:55	0:40	-39.58	15:54	+58.8	16:32	17:15	17:56	23:57	16:06	1:21
18 Tue	05:57	06:38	07:21	08:00	-39.62	11:57	267.0	+3.2	07:54	0:40	-39.63	15:54	+71.3	16:32	17:15	17:56	23:57	16:06	1:21
19 Wed	05:58	06:39	07:22	08:00	-39.66	11:57	268.0	+2.7	07:54	0:39	-39.67	15:54	+83.4	16:33	17:16	17:57	23:58	16:07	1:21
20 Thu	05:59	06:39	07:22	08:01	-39.68	11:58	269.0	+2.2	07:54	0:39	-39.68	15:55	+95.1	16:33	17:16	17:57	23:58	16:07	1:21
21 Fri	05:59	06:40	07:23	08:01	-39.69	11:58	270.0	+1.7	07:54	0:39	-39.69	15:55	+106.5	16:34	17:17	17:58	23:59	16:07	1:21
22 Sat	06:00	06:40	07:23	08:02	-39.68	11:59	271.1	+1.2	07:54	0:39	-39.68	15:56	+117.5	16:34	17:17	17:58	23:59	16:07	1:21
23 Sun	06:00	06:41	07:24	08:02	-39.66	11:59	272.1	+0.7	07:54	0:39	-39.65	15:56	+128.4	16:35	17:18	17:59	00:00	16:06	1:21
24 Mon	06:00	06:41	07:24	08:03	-39.63	12:00	273.1	+0.2	07:54	0:40	-39.61	15:57	+139.2	16:35	17:18	17:59	00:00	16:06	1:21
25 Tue	06:01	06:42	07:25	08:03	-39.58	12:00	274.1	-0.3	07:55	0:40	-39.56	15:58	+150.0	16:36	17:19	18:00	00:01	16:06	1:20
26 Wed	06:01	06:42	07:25	08:03	-39.51	12:01	275.1	-0.8	07:55	0:40	-39.49	15:58	+160.8	16:37	17:20	18:01	00:01	16:05	1:20
27 Thu	06:01	06:42	07:25	08:03	-39.43	12:01	276.1	-1.3	07:56	0:40	-39.40	15:59	+171.6	16:37	17:21	18:01	00:02	16:04	1:20
28 Fri	06:02	06:42	07:25	08:04	-39.34	12:02	277.2	-1.8	07:56	0:40	-39.30	16:00	-177.4	16:38	17:21	18:02	00:02	16:04	1:20
29 Sat	06:02	06:42	07:25	08:04	-39.23	12:02	278.2	-2.2	07:57	0:40	-39.19	16:01	-166.4	16:39	17:22	18:03	00:02	16:03	1:20
30 Sun	06:02	06:43	07:26	08:04	-39.10	12:03	279.2	-2.7	07:58	0:40	-39.06	16:02	-155.1	16:40	17:23	18:04	00:03	16:02	1:20
31 Mon	06:02	06:43	07:26	08:04	-38.96	12:03	280.2	-3.2	07:59	0:40	-38.91	16:03	-143.8	16:41	17:24	18:05	00:03	16:01	1:20

° 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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