April 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 Sun	03:36	04:20	05:01	05:33	+7.57	12:04	12.2	-3.7	13:02	1:05	+7.90	18:35	+113.0	19:08	19:49	20:33	00:04	10:56	0:55
2 Mon	03:33	04:17	04:58	05:31	+8.19	12:03	13.2	-3.4	13:06	1:06	+8.52	18:37	+125.5	19:10	19:51	20:35	00:03	10:52	0:54
3 Tue	03:31	04:15	04:56	05:29	+8.80	12:03	14.1	-3.1	13:10	1:06	+9.14	18:39	+138.4	19:11	19:53	20:38	00:03	10:48	0:54
4 Wed	03:28	04:12	04:54	05:26	+9.42	12:03	15.1	-2.8	13:14	1:06	+9.76	18:40	+151.8	19:13	19:55	20:40	00:03	10:44	0:54
5 Thu	03:25	04:10	04:51	05:24	+10.04	12:03	16.1	-2.6	13:18	1:06	+10.37	18:42	+165.6	19:15	19:57	20:42	00:02	10:40	0:53
6 Fri	03:22	04:07	04:49	05:22	+10.65	12:02	17.1	-2.3	13:22	1:07	+10.99	18:44	+179.7	19:17	19:59	20:45	00:02	10:36	0:53
7 Sat	03:19	04:05	04:47	05:20	+11.26	12:02	18.1	-2.0	13:26	1:07	+11.60	18:45	-166.2	19:18	20:01	20:47	00:02	10:32	0:53
8 Sun	03:16	04:02	04:44	05:17	+11.86	12:02	19.1	-1.7	13:30	1:07	+12.20	18:47	-152.0	19:20	20:03	20:49	00:02	10:28	0:52
9 Mon	03:13	04:00	04:42	05:15	+12.47	12:01	20.0	-1.5	13:33	1:08	+12.81	18:49	-138.1	19:22	20:05	20:52	00:01	10:24	0:52
10 Tue	03:10	03:57	04:40	05:13	+13.07	12:01	21.0	-1.2	13:37	1:08	+13.41	18:50	-124.5	19:24	20:07	20:54	00:01	10:20	0:52
11 Wed	03:07	03:55	04:37	05:11	+13.67	12:01	22.0	-0.9	13:41	1:08	+14.01	18:52	-111.2	19:26	20:09	20:57	00:01	10:17	0:51
12 Thu	03:04	03:52	04:35	05:09	+14.27	12:01	23.0	-0.7	13:45	1:09	+14.61	18:54	-98.3	19:27	20:11	20:59	00:01	10:13	0:51
13 Fri	03:01	03:49	04:33	05:06	+14.86	12:00	24.0	-0.4	13:49	1:09	+15.20	18:55	-85.8	19:29	20:13	21:02	00:00	10:09	0:51
14 Sat	02:58	03:47	04:31	05:04	+15.45	12:00	24.9	-0.2	13:53	1:09	+15.79	18:57	-73.7	19:31	20:15	21:04	00:00	10:05	0:50
15 Sun	02:55	03:44	04:28	05:02	+16.04	12:00	25.9	+0.1	13:57	1:10	+16.38	18:59	-61.8	19:33	20:17	21:07	00:00	10:01	0:50
16 Mon	02:52	03:42	04:26	05:00	+16.62	12:00	26.9	+0.3	14:00	1:10	+16.96	19:00	-50.2	19:35	20:19	21:10	00:00	09:57	0:50
17 Tue	02:49	03:39	04:24	04:58	+17.20	11:59	27.9	+0.5	14:04	1:10	+17.54	19:02	-38.8	19:36	20:21	21:12	23:59	09:54	0:49
18 Wed	02:46	03:37	04:21	04:56	+17.78	11:59	28.9	+0.8	14:08	1:11	+18.12	19:04	-27.6	19:38	20:23	21:15	23:59	09:50	0:49
19 Thu	02:43	03:34	04:19	04:54	+18.35	11:59	29.8	+1.0	14:12	1:11	+18.69	19:05	-16.5	19:40	20:26	21:18	23:59	09:46	0:49
20 Fri	02:39	03:32	04:17	04:52	+18.92	11:59	30.8	+1.2	14:16	1:11	+19.26	19:07	-5.5	19:42	20:28	21:21	23:59	09:42	0:49
21 Sat	02:36	03:29	04:15	04:50	+19.49	11:59	31.8	+1.4	14:19	1:12	+19.82	19:09	+5.4	19:44	20:30	21:24	23:59	09:39	0:48
22 Sun	02:33	03:26	04:13	04:47	+20.05	11:58	32.8	+1.6	14:23	1:12	+20.38	19:11	+16.2	19:46	20:32	21:26	23:58	09:35	0:48
23 Mon	02:30	03:24	04:10	04:45	+20.61	11:58	33.7	+1.8	14:27	1:12	+20.94	19:12	+27.0	19:48	20:34	21:29	23:58	09:31	0:48
24 Tue	02:26	03:21	04:08	04:43	+21.16	11:58	34.7	+1.9	14:30	1:13	+21.49	19:14	+37.9	19:49	20:36	21:32	23:58	09:28	0:47
25 Wed	02:23	03:19	04:06	04:41	+21.70	11:58	35.7	+2.1	14:34	1:13	+22.03	19:16	+48.8	19:51	20:39	21:35	23:58	09:24	0:47
26 Thu	02:20	03:16	04:04	04:39	+22.25	11:58	36.7	+2.3	14:38	1:13	+22.57	19:17	+59.9	19:53	20:41	21:38	23:58	09:20	0:47
27 Fri	02:16	03:14	04:02	04:37	+22.78	11:58	37.6	+2.4	14:41	1:13	+23.11	19:19	+71.2	19:55	20:43	21:42	23:58	09:17	0:46
28 Sat	02:13	03:11	03:59	04:35	+23.32	11:57	38.6	+2.6	14:45	1:14	+23.64	19:20	+82.8	19:57	20:45	21:45	23:57	09:13	0:46
29 Sun	02:09	03:09	03:57	04:34	+23.84	11:57	39.6	+2.7	14:49	1:14	+24.17	19:22	+94.7	19:59	20:48	21:48	23:57	09:09	0:46
30 Mon	02:06	03:06	03:55	04:32	+24.37	11:57	40.5	+2.8	14:52	1:14	+24.69	19:24	+107.1	20:00	20:50	21:51	23:57	09:06	0:45

° 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).

Generated by Kalendis 9.837(1557)-H <http://www.sym454.org/>