Ephemeris for 21P/Giacobini-Zinner

by Dominic Ford

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All times computed for South El Monte (latitude 34.05°; longitude -118.05°) and expressed in South El Monte time.

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Ephemeris for 21P/Giacobini-Zinner
Date	Time	Age of Moon	Right Ascension	Declination	Rise	Culm	Set	Approx Mag.	Observable (hover mouse)	Constellation
Date	Time	Age of Moon	Right Ascension	Declination	Rise	Culm	Set	Approx Mag.	Observable (hover mouse)	Constellation

Ephemeris for 21P/Giacobini-Zinner
Date			Time	Age of Moon	Right Ascension	Declination	Rise	Culm	Set	Approx Mag.	Observable (hover mouse)	Constellation
Date			Time	Age of Moon	Right Ascension	Declination	Rise	Culm	Set	Approx Mag.	Observable (hover mouse)	Constellation
2026	Apr	20	00:00 PDT	02 days	08^h55^m40^s	−08°54'00"	14:12	19:51	01:29	20.7	20:29 until 23:33	Hydra
2026	Apr	21	00:00 PDT	03 days	08^h55^m54^s	−08°46'03"	14:08	19:47	01:26	20.7	20:30 until 23:30	Hydra
2026	Apr	22	00:00 PDT	04 days	08^h56^m10^s	−08°38'14"	14:04	19:43	01:22	20.7	20:31 until 23:27	Hydra
2026	Apr	23	00:00 PDT	05 days	08^h56^m26^s	−08°30'33"	14:00	19:40	01:19	20.7	20:32 until 23:24	Hydra
2026	Apr	24	00:00 PDT	06 days	08^h56^m43^s	−08°23'00"	13:56	19:36	01:16	20.7	20:33 until 23:21	Hydra
2026	Apr	25	00:00 PDT	07 days	08^h57^m01^s	−08°15'35"	13:52	19:32	01:13	20.8	20:34 until 23:17	Hydra
2026	Apr	26	00:00 PDT	08 days	08^h57^m20^s	−08°08'18"	13:48	19:29	01:09	20.8	20:35 until 23:14	Hydra
2026	Apr	27	00:00 PDT	09 days	08^h57^m40^s	−08°01'09"	13:44	19:25	01:06	20.8	20:36 until 23:11	Hydra
2026	Apr	28	00:00 PDT	10 days	08^h58^m00^s	−07°54'08"	13:40	19:21	01:03	20.8	20:37 until 23:08	Hydra
2026	Apr	29	00:00 PDT	11 days	08^h58^m21^s	−07°47'15"	13:36	19:18	00:59	20.8	20:38 until 23:05	Hydra
2026	Apr	30	00:00 PDT	12 days	08^h58^m43^s	−07°40'30"	13:32	19:14	00:56	20.9	20:39 until 23:02	Hydra
2026	May	01	00:00 PDT	13 days	08^h59^m06^s	−07°33'53"	13:29	19:11	00:53	20.9	20:40 until 22:58	Hydra
2026	May	02	00:00 PDT	14 days	08^h59^m30^s	−07°27'23"	13:25	19:07	00:50	20.9	20:40 until 22:55	Hydra
2026	May	03	00:00 PDT	15 days	08^h59^m54^s	−07°21'02"	13:21	19:04	00:46	20.9	20:41 until 22:52	Hydra
2026	May	04	00:00 PDT	16 days	09^h00^m20^s	−07°14'49"	13:17	19:00	00:43	20.9	20:42 until 22:49	Hydra
2026	May	05	00:00 PDT	17 days	09^h00^m46^s	−07°08'43"	13:13	18:57	00:40	21.0	20:43 until 22:46	Hydra
2026	May	06	00:00 PDT	18 days	09^h01^m12^s	−07°02'46"	13:10	18:53	00:37	21.0	20:44 until 22:43	Hydra
2026	May	07	00:00 PDT	19 days	09^h01^m40^s	−06°56'56"	13:06	18:50	00:34	21.0	20:45 until 22:40	Hydra
2026	May	08	00:00 PDT	20 days	09^h02^m08^s	−06°51'14"	13:02	18:46	00:30	21.0	20:46 until 22:36	Hydra
2026	May	09	00:00 PDT	21 days	09^h02^m36^s	−06°45'40"	12:58	18:43	00:27	21.0	20:47 until 22:33	Hydra
2026	May	10	00:00 PDT	22 days	09^h03^m06^s	−06°40'13"	12:55	18:39	00:24	21.1	20:48 until 22:30	Hydra
2026	May	11	00:00 PDT	23 days	09^h03^m36^s	−06°34'55"	12:51	18:36	00:21	21.1	20:49 until 22:27	Hydra
2026	May	12	00:00 PDT	24 days	09^h04^m06^s	−06°29'44"	12:47	18:32	00:18	21.1	20:50 until 22:24	Hydra
2026	May	13	00:00 PDT	25 days	09^h04^m38^s	−06°24'41"	12:44	18:29	00:14	21.1	20:51 until 22:21	Hydra
2026	May	14	00:00 PDT	26 days	09^h05^m10^s	−06°19'46"	12:40	18:26	00:11	21.1	20:52 until 22:18	Hydra
All times computed for South El Monte (latitude 34.05; longitude -118.05) and expressed in South El Monte time. All positions are in J2000.0 coordinates. Ephemeris by Dominic Ford – https://in-the-sky.org/ephemeris.php

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