September 2023 (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 °	Mid Day	° Sun Long	EoT	Day Span	Day Hour	Set Az °	Sun Set	° Moon Phase	End of Twilight			Mid- Night	Night Span	Night Hour	Moon Rise	° Rise Phase	Moon Set	° Set Phase
	Astro	Sea	Civil											Civil	Sea	Astro
1 Fri	03:07	03:54	04:37	05:11	76.5	12:00	158.8	-0.1	13:38	1:08	283.2	18:49	204.3	19:22	20:05	20:52	00:00	10:24	0:52	19:37	204.7	06:47	197.3
2 Sat	03:09	03:56	04:39	05:12	77.1	12:00	159.8	+0.2	13:34	1:08	282.6	18:46	217.9	19:20	20:02	20:49	00:00	10:27	0:52	19:50	218.5	08:16	212.0
3 Sun	03:11	03:58	04:41	05:14	77.7	11:59	160.7	+0.5	13:30	1:08	282.0	18:44	231.2	19:17	19:59	20:46	23:59	10:31	0:53	20:05	231.9	09:43	226.2
4 Mon	03:14	04:00	04:42	05:15	78.3	11:59	161.7	+0.9	13:27	1:07	281.4	18:42	243.9	19:15	19:57	20:43	23:59	10:35	0:53	20:21	244.8	11:09	240.0
5 Tue	03:16	04:02	04:44	05:17	78.9	11:59	162.7	+1.2	13:23	1:07	280.8	18:40	256.3	19:12	19:54	20:40	23:59	10:39	0:53	20:43	257.3	12:33	253.2
6 Wed	03:18	04:04	04:46	05:19	79.5	11:58	163.6	+1.5	13:19	1:07	280.2	18:37	268.2	19:10	19:52	20:37	23:58	10:43	0:54	21:12	269.4	13:53	265.9
7 Thu	03:20	04:06	04:47	05:20	80.1	11:58	164.6	+1.9	13:15	1:06	279.6	18:35	279.8	19:08	19:49	20:34	23:58	10:47	0:54	21:51	281.3	15:05	278.1
8 Fri	03:23	04:08	04:49	05:22	80.7	11:58	165.6	+2.2	13:11	1:06	279.0	18:33	291.1	19:05	19:47	20:31	23:58	10:51	0:54	22:43	293.0	16:04	289.9
9 Sat	03:25	04:09	04:51	05:23	81.3	11:57	166.6	+2.6	13:07	1:06	278.4	18:31	302.2	19:03	19:44	20:28	23:57	10:54	0:55	23:46	304.6	16:48	301.4
10 Sun	03:27	04:11	04:52	05:25	81.9	11:57	167.5	+2.9	13:03	1:05	277.8	18:28	313.1	19:01	19:42	20:25	23:57	10:58	0:55	never		17:20	312.6
11 Mon	03:29	04:13	04:54	05:26	82.5	11:57	168.5	+3.3	12:59	1:05	277.1	18:26	324.0	18:58	19:39	20:23	23:57	11:02	0:55	00:56	316.1	17:43	323.7
12 Tue	03:31	04:15	04:56	05:28	83.1	11:56	169.5	+3.6	12:56	1:05	276.5	18:24	334.9	18:56	19:36	20:20	23:56	11:06	0:56	02:08	327.5	18:01	334.7
13 Wed	03:33	04:17	04:57	05:30	83.8	11:56	170.4	+4.0	12:52	1:04	275.9	18:21	345.7	18:54	19:34	20:17	23:56	11:10	0:56	03:21	338.9	18:14	345.7
14 Thu	03:35	04:19	04:59	05:31	84.4	11:56	171.4	+4.3	12:48	1:04	275.3	18:19	356.6	18:51	19:31	20:14	23:56	11:14	0:56	04:32	350.4	18:25	356.7
15 Fri	03:38	04:20	05:01	05:33	85.0	11:55	172.4	+4.7	12:44	1:04	274.7	18:17	7.6	18:49	19:29	20:11	23:55	11:18	0:56	05:43	1.9	18:36	7.8
16 Sat	03:40	04:22	05:02	05:34	85.6	11:55	173.4	+5.0	12:40	1:03	274.1	18:14	18.7	18:46	19:26	20:09	23:55	11:22	0:57	06:53	13.4	18:46	18.9
17 Sun	03:42	04:24	05:04	05:36	86.2	11:55	174.3	+5.4	12:36	1:03	273.4	18:12	29.9	18:44	19:24	20:06	23:54	11:26	0:57	08:05	25.1	18:56	30.2
18 Mon	03:44	04:26	05:06	05:38	86.9	11:54	175.3	+5.7	12:32	1:03	272.8	18:10	41.2	18:42	19:22	20:03	23:54	11:29	0:57	09:19	37.0	19:09	41.7
19 Tue	03:46	04:27	05:07	05:39	87.5	11:54	176.3	+6.1	12:28	1:02	272.2	18:08	52.8	18:39	19:19	20:01	23:54	11:33	0:58	10:36	49.1	19:25	53.4
20 Wed	03:48	04:29	05:09	05:41	88.1	11:54	177.3	+6.5	12:24	1:02	271.6	18:05	64.6	18:37	19:17	19:58	23:53	11:37	0:58	11:55	61.6	19:47	65.5
21 Thu	03:49	04:31	05:11	05:42	88.7	11:53	178.3	+6.8	12:20	1:02	271.0	18:03	76.7	18:35	19:14	19:55	23:53	11:41	0:58	13:15	74.3	20:18	77.9
22 Fri	03:51	04:33	05:12	05:44	89.3	11:53	179.2	+7.2	12:17	1:01	270.3	18:01	89.2	18:32	19:12	19:53	23:53	11:45	0:59	14:30	87.3	21:05	90.8
23 Sat	03:53	04:34	05:14	05:46	90.0	11:52	180.2	+7.5	12:13	1:01	269.7	17:58	102.0	18:30	19:09	19:50	23:52	11:49	0:59	15:31	100.7	22:10	104.3
24 Sun	03:55	04:36	05:15	05:47	90.6	11:52	181.2	+7.9	12:09	1:01	269.1	17:56	115.2	18:28	19:07	19:48	23:52	11:53	0:59	16:16	114.3	23:33	118.4
25 Mon	03:57	04:38	05:17	05:49	91.2	11:52	182.2	+8.2	12:05	1:00	268.5	17:54	128.8	18:25	19:05	19:45	23:52	11:57	1:00	16:48	128.1	never
26 Tue	03:59	04:40	05:19	05:50	91.9	11:51	183.1	+8.6	12:01	1:00	267.8	17:51	142.6	18:23	19:02	19:42	23:51	12:01	1:00	17:10	142.2	01:04	132.9
27 Wed	04:01	04:41	05:20	05:52	92.5	11:51	184.1	+8.9	11:57	1:00	267.2	17:49	156.6	18:21	19:00	19:40	23:51	12:05	1:00	17:27	156.4	02:38	147.7
28 Thu	04:03	04:43	05:22	05:54	93.1	11:51	185.1	+9.2	11:53	0:59	266.6	17:47	170.6	18:19	18:57	19:37	23:51	12:09	1:01	17:41	170.5	04:10	162.6
29 Fri	04:04	04:45	05:24	05:55	93.7	11:50	186.1	+9.6	11:49	0:59	266.0	17:45	184.5	18:16	18:55	19:35	23:50	12:12	1:01	17:55	184.6	05:41	177.5
30 Sat	04:06	04:46	05:25	05:57	94.4	11:50	187.1	+9.9	11:45	0:59	265.3	17:42	198.1	18:14	18:53	19:32	23:50	12:16	1:01	18:08	198.4	07:10	192.2

° 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] measured clockwise from true north with center of Sun at horizon (east = 90°, west = 270°). 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 11.161(1691)-Tu <http://individual.utoronto.ca/kalendis/>