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	11	00:00 PDT	23 days	08^h54^m14^s	−10°11'15"	14:50	20:25	01:59	20.5	20:21 until 00:02	Hydra
2026	Apr	11	03:00 PDT	23 days	08^h54^m15^s	−10°10'06"	14:50	20:25	01:59	20.5	20:21 until 00:03	Hydra
2026	Apr	11	06:00 PDT	23 days	08^h54^m16^s	−10°08'57"	14:50	20:25	02:00	20.5	20:21 until 00:03	Hydra
2026	Apr	11	09:00 PDT	23 days	08^h54^m16^s	−10°07'49"	14:49	20:25	02:00	20.5	20:21 until 00:03	Hydra
2026	Apr	11	12:00 PDT	23 days	08^h54^m17^s	−10°06'41"	14:49	20:25	02:00	20.5	20:21 until 00:03	Hydra
2026	Apr	11	15:00 PDT	23 days	08^h54^m18^s	−10°05'33"	14:49	20:25	02:00	20.5	20:21 until 00:03	Hydra
2026	Apr	11	18:00 PDT	23 days	08^h54^m19^s	−10°04'26"	14:49	20:25	02:00	20.5	20:21 until 00:03	Hydra
2026	Apr	11	21:00 PDT	24 days	08^h54^m19^s	−10°03'18"	14:49	20:25	02:00	20.5	20:21 until 00:03	Hydra
2026	Apr	12	00:00 PDT	24 days	08^h54^m20^s	−10°02'10"	14:45	20:21	01:56	20.5	20:22 until 23:59	Hydra
2026	Apr	12	03:00 PDT	24 days	08^h54^m21^s	−10°01'02"	14:45	20:21	01:56	20.5	20:22 until 23:59	Hydra
2026	Apr	12	06:00 PDT	24 days	08^h54^m21^s	−09°59'55"	14:45	20:21	01:56	20.5	20:22 until 23:59	Hydra
2026	Apr	12	09:00 PDT	24 days	08^h54^m22^s	−09°58'47"	14:45	20:21	01:56	20.5	20:22 until 23:59	Hydra
2026	Apr	12	12:00 PDT	24 days	08^h54^m23^s	−09°57'40"	14:45	20:21	01:56	20.5	20:22 until 00:00	Hydra
2026	Apr	12	15:00 PDT	24 days	08^h54^m24^s	−09°56'33"	14:45	20:21	01:56	20.5	20:22 until 00:00	Hydra
2026	Apr	12	18:00 PDT	24 days	08^h54^m25^s	−09°55'27"	14:45	20:21	01:56	20.5	20:22 until 00:00	Hydra
2026	Apr	12	21:00 PDT	25 days	08^h54^m26^s	−09°54'20"	14:45	20:21	01:56	20.5	20:22 until 00:00	Hydra
2026	Apr	13	00:00 PDT	25 days	08^h54^m26^s	−09°53'13"	14:41	20:17	01:53	20.5	20:22 until 23:56	Hydra
2026	Apr	13	03:00 PDT	25 days	08^h54^m27^s	−09°52'06"	14:41	20:17	01:53	20.5	20:22 until 23:56	Hydra
2026	Apr	13	06:00 PDT	25 days	08^h54^m28^s	−09°50'59"	14:41	20:17	01:53	20.5	20:22 until 23:56	Hydra
2026	Apr	13	09:00 PDT	25 days	08^h54^m29^s	−09°49'53"	14:41	20:17	01:53	20.5	20:22 until 23:56	Hydra
2026	Apr	13	12:00 PDT	25 days	08^h54^m30^s	−09°48'46"	14:41	20:17	01:53	20.5	20:22 until 23:56	Hydra
2026	Apr	13	15:00 PDT	25 days	08^h54^m31^s	−09°47'40"	14:41	20:17	01:53	20.5	20:22 until 23:56	Hydra
2026	Apr	13	18:00 PDT	25 days	08^h54^m32^s	−09°46'35"	14:41	20:17	01:53	20.5	20:22 until 23:56	Hydra
2026	Apr	13	21:00 PDT	26 days	08^h54^m33^s	−09°45'29"	14:41	20:17	01:53	20.5	20:22 until 23:57	Hydra
2026	Apr	14	00:00 PDT	26 days	08^h54^m34^s	−09°44'23"	14:37	20:13	01:49	20.5	20:23 until 23:53	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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