Occult lunar occultations, computed
Location

Jupiter's moons in December 2027

Io · Europa · Ganymede · Callisto — eclipses, occultations, transits, shadows

Jupiter's four big moons put on a show every night: they slip behind the planet and into its shadow, cross its face, and drag their shadows across the cloud tops. Any telescope shows it. Times are for the whole Earth; pick a location and the list keeps only what your sky shows.

When (UTC)EventJupiter in your sky
Dec 1 00:04 UTCIo's transit endstakes 4 min—
Dec 1 17:45 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 1 21:13 UTCIo reappears from behind Jupitertakes 4 min—
Dec 2 04:55 UTCEuropa's shadow enters the disctakes 7 min—
Dec 2 07:17 UTCEuropa begins its transit across the disctakes 4 min—
Dec 2 07:38 UTCEuropa's shadow leaves the disctakes 3 min—
Dec 2 10:00 UTCEuropa's transit endstakes 4 min—
Dec 2 15:06 UTCIo's shadow enters the disctakes 7 min—
Dec 2 16:18 UTCIo begins its transit across the disctakes 4 min—
Dec 2 17:22 UTCIo's shadow leaves the disctakes 3 min—
Dec 2 18:33 UTCIo's transit endstakes 4 min—
Dec 3 04:05 UTCGanymede's shadow enters the disctakes 16 min—
Dec 3 07:28 UTCGanymede's shadow leaves the disctakes 8 min—
Dec 3 09:01 UTCGanymede begins its transit across the disctakes 9 min—
Dec 3 12:11 UTCGanymede's transit endstakes 9 min—
Dec 3 12:14 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 3 15:42 UTCIo reappears from behind Jupitertakes 4 min—
Dec 4 00:01 UTCEuropa disappears into Jupiter's shadowtakes 4 min—
Dec 4 05:08 UTCEuropa reappears from behind Jupitertakes 4 min—
Dec 4 09:34 UTCIo's shadow enters the disctakes 9 min—
Dec 4 10:47 UTCIo begins its transit across the disctakes 4 min—
Dec 4 11:51 UTCIo's shadow leaves the disctakes 3 min—
Dec 4 13:02 UTCIo's transit endstakes 4 min—
Dec 5 06:42 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 5 10:10 UTCIo reappears from behind Jupitertakes 4 min—
Dec 5 18:08 UTCEuropa's shadow enters the disc—
Dec 5 18:10 UTCEuropa's shadow leaves the disc—
Dec 5 18:12 UTCEuropa's shadow enters the disctakes 4 min—
Dec 5 20:36 UTCEuropa begins its transit across the disctakes 4 min—
Dec 5 20:55 UTCEuropa's shadow leaves the disctakes 3 min—
Dec 5 23:19 UTCEuropa's transit endstakes 4 min—
Dec 6 04:02 UTCIo's shadow enters the disctakes 9 min—
Dec 6 05:15 UTCIo begins its transit across the disctakes 4 min—
Dec 6 06:19 UTCIo's shadow leaves the disctakes 3 min—
Dec 6 07:31 UTCIo's transit endstakes 4 min—
Dec 6 09:29 UTCCallisto disappears into Jupiter's shadowtakes 15 min—
Dec 6 12:46 UTCCallisto reappears from Jupiter's shadowtakes 15 min—
Dec 6 18:02 UTCGanymede disappears into Jupiter's shadowtakes 9 min—
Dec 6 21:22 UTCGanymede reappears from Jupiter's shadowtakes 9 min—
Dec 6 21:31 UTCCallisto disappears behind Jupitertakes 21 min—
Dec 6 23:03 UTCGanymede disappears behind Jupitertakes 10 min—
Dec 6 23:54 UTCCallisto reappears from behind Jupitertakes 21 min—
Dec 7 01:10 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 7 02:13 UTCGanymede reappears from behind Jupitertakes 10 min—
Dec 7 04:39 UTCIo reappears from behind Jupitertakes 4 min—
Dec 7 13:18 UTCEuropa disappears into Jupiter's shadowtakes 4 min—
Dec 7 18:26 UTCEuropa reappears from behind Jupitertakes 4 min—
Dec 7 22:34 UTCIo's shadow enters the disctakes 4 min—
Dec 7 23:44 UTCIo begins its transit across the disctakes 4 min—
Dec 8 00:47 UTCIo's shadow leaves the disctakes 3 min—
Dec 8 01:59 UTCIo's transit endstakes 4 min—
Dec 8 19:38 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 8 23:08 UTCIo reappears from behind Jupitertakes 4 min—
Dec 9 07:26 UTCEuropa's shadow enters the disctakes 10 min—
Dec 9 09:55 UTCEuropa begins its transit across the disctakes 4 min—
Dec 9 10:12 UTCEuropa's shadow leaves the disctakes 4 min—
Dec 9 12:38 UTCEuropa's transit endstakes 4 min—
Dec 9 17:02 UTCIo's shadow enters the disctakes 4 min—
Dec 9 18:13 UTCIo begins its transit across the disctakes 4 min—
Dec 9 19:15 UTCIo's shadow leaves the disctakes 3 min—
Dec 9 20:28 UTCIo's transit endstakes 4 min—
Dec 10 08:04 UTCGanymede's shadow enters the disc—
Dec 10 08:08 UTCGanymede's shadow leaves the disc—
Dec 10 08:10 UTCGanymede's shadow enters the disctakes 12 min—
Dec 10 11:26 UTCGanymede's shadow leaves the disctakes 8 min—
Dec 10 13:06 UTCGanymede begins its transit across the disctakes 10 min—
Dec 10 14:07 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 10 16:14 UTCGanymede's transit endstakes 10 min—
Dec 10 17:36 UTCIo reappears from behind Jupitertakes 4 min—
Dec 11 02:35 UTCEuropa disappears into Jupiter's shadowtakes 4 min—
Dec 11 07:44 UTCEuropa reappears from behind Jupitertakes 4 min—
Dec 11 11:30 UTCIo's shadow enters the disctakes 4 min—
Dec 11 12:41 UTCIo begins its transit across the disctakes 4 min—
Dec 11 13:44 UTCIo's shadow leaves the disctakes 3 min—
Dec 11 14:56 UTCIo's transit endstakes 4 min—
Dec 12 08:35 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 12 12:05 UTCIo reappears from behind Jupitertakes 4 min—
Dec 12 20:46 UTCEuropa's shadow enters the disctakes 7 min—
Dec 12 23:14 UTCEuropa begins its transit across the disctakes 4 min—
Dec 12 23:29 UTCEuropa's shadow leaves the disctakes 3 min—
Dec 13 01:56 UTCEuropa's transit endstakes 4 min—
Dec 13 05:58 UTCIo's shadow enters the disctakes 4 min—
Dec 13 07:10 UTCIo begins its transit across the disctakes 4 min—
Dec 13 08:12 UTCIo's shadow leaves the disctakes 4 min—
Dec 13 09:25 UTCIo's transit endstakes 4 min—
Dec 13 22:00 UTCGanymede disappears into Jupiter's shadowtakes 9 min—
Dec 14 01:18 UTCGanymede reappears from Jupiter's shadowtakes 9 min—
Dec 14 03:03 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 14 03:05 UTCGanymede disappears behind Jupitertakes 10 min—
Dec 14 06:13 UTCGanymede reappears from behind Jupitertakes 10 min—
Dec 14 06:33 UTCIo reappears from behind Jupitertakes 4 min—
Dec 14 15:52 UTCEuropa disappears into Jupiter's shadowtakes 4 min—
Dec 14 19:14 UTCCallisto's shadow enters the disc—
Dec 14 19:21 UTCCallisto's shadow leaves the disc—
Dec 14 19:23 UTCCallisto's shadow enters the disctakes 15 min—
Dec 14 21:01 UTCEuropa reappears from behind Jupitertakes 4 min—
Dec 14 22:36 UTCCallisto's shadow leaves the disctakes 13 min—
Dec 15 00:24 UTCIo's shadow enters the disctakes 7 min—
Dec 15 01:38 UTCIo begins its transit across the disctakes 4 min—
Dec 15 02:40 UTCIo's shadow leaves the disctakes 3 min—
Dec 15 03:53 UTCIo's transit endstakes 4 min—
Dec 15 07:16 UTCCallisto begins its transit across the disctakes 23 min—
Dec 15 09:24 UTCCallisto's transit endstakes 23 min—
Dec 15 21:32 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 16 01:02 UTCIo reappears from behind Jupitertakes 4 min—
Dec 16 10:00 UTCEuropa's shadow enters the disc—
Dec 16 10:02 UTCEuropa's shadow leaves the disc—
Dec 16 10:04 UTCEuropa's shadow enters the disctakes 4 min—
Dec 16 12:32 UTCEuropa begins its transit across the disctakes 4 min—
Dec 16 12:47 UTCEuropa's shadow leaves the disctakes 3 min—
Dec 16 15:14 UTCEuropa's transit endstakes 4 min—
Dec 16 18:52 UTCIo's shadow enters the disctakes 9 min—
Dec 16 20:06 UTCIo begins its transit across the disctakes 4 min—
Dec 16 21:08 UTCIo's shadow leaves the disctakes 3 min—
Dec 16 22:21 UTCIo's transit endstakes 4 min—
Dec 17 12:01 UTCGanymede's shadow enters the disctakes 16 min—
Dec 17 15:22 UTCGanymede's shadow leaves the disctakes 8 min—
Dec 17 16:00 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 17 17:06 UTCGanymede begins its transit across the disctakes 10 min—
Dec 17 19:30 UTCIo reappears from behind Jupitertakes 4 min—
Dec 17 20:12 UTCGanymede's transit endstakes 10 min—
Dec 18 05:09 UTCEuropa disappears into Jupiter's shadowtakes 4 min—
Dec 18 10:18 UTCEuropa reappears from behind Jupitertakes 4 min—
Dec 18 13:20 UTCIo's shadow enters the disctakes 9 min—
Dec 18 14:35 UTCIo begins its transit across the disctakes 4 min—
Dec 18 15:37 UTCIo's shadow leaves the disctakes 3 min—
Dec 18 16:49 UTCIo's transit endstakes 4 min—
Dec 19 10:28 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 19 13:58 UTCIo reappears from behind Jupitertakes 4 min—
Dec 19 23:18 UTCEuropa's shadow enters the disctakes 10 min—
Dec 20 01:49 UTCEuropa begins its transit across the disctakes 4 min—
Dec 20 02:04 UTCEuropa's shadow leaves the disctakes 3 min—
Dec 20 04:31 UTCEuropa's transit endstakes 4 min—
Dec 20 07:49 UTCIo's shadow enters the disctakes 7 min—
Dec 20 09:03 UTCIo begins its transit across the disctakes 4 min—
Dec 20 10:05 UTCIo's shadow leaves the disctakes 3 min—
Dec 20 11:18 UTCIo's transit endstakes 4 min—
Dec 21 01:57 UTCGanymede disappears into Jupiter's shadowtakes 9 min—
Dec 21 04:57 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 21 05:15 UTCGanymede reappears from Jupiter's shadowtakes 9 min—
Dec 21 07:04 UTCGanymede disappears behind Jupitertakes 10 min—
Dec 21 08:27 UTCIo reappears from behind Jupitertakes 4 min—
Dec 21 10:09 UTCGanymede reappears from behind Jupitertakes 10 min—
Dec 21 18:25 UTCEuropa disappears into Jupiter's shadowtakes 4 min—
Dec 21 23:34 UTCEuropa reappears from behind Jupitertakes 4 min—
Dec 22 02:20 UTCIo's shadow enters the disctakes 4 min—
Dec 22 03:31 UTCIo begins its transit across the disctakes 4 min—
Dec 22 04:33 UTCIo's shadow leaves the disctakes 3 min—
Dec 22 05:46 UTCIo's transit endstakes 4 min—
Dec 22 23:25 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 23 02:55 UTCIo reappears from behind Jupitertakes 4 min—
Dec 23 03:30 UTCCallisto disappears into Jupiter's shadowtakes 16 min—
Dec 23 06:37 UTCCallisto reappears from Jupiter's shadowtakes 16 min—
Dec 23 12:39 UTCEuropa's shadow enters the disctakes 7 min—
Dec 23 15:07 UTCEuropa begins its transit across the disctakes 4 min—
Dec 23 15:21 UTCEuropa's shadow leaves the disctakes 3 min—
Dec 23 15:51 UTCCallisto disappears behind Jupitertakes 29 min—
Dec 23 17:37 UTCCallisto reappears from behind Jupitertakes 29 min—
Dec 23 17:48 UTCEuropa's transit endstakes 4 min—
Dec 23 20:48 UTCIo's shadow enters the disctakes 4 min—
Dec 23 21:59 UTCIo begins its transit across the disctakes 4 min—
Dec 23 23:01 UTCIo's shadow leaves the disctakes 3 min—
Dec 24 00:14 UTCIo's transit endstakes 4 min—
Dec 24 15:59 UTCGanymede's shadow enters the disc—
Dec 24 16:03 UTCGanymede's shadow leaves the disc—
Dec 24 16:05 UTCGanymede's shadow enters the disctakes 10 min—
Dec 24 17:53 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 24 19:19 UTCGanymede's shadow leaves the disctakes 7 min—
Dec 24 21:03 UTCGanymede begins its transit across the disctakes 10 min—
Dec 24 21:23 UTCIo reappears from behind Jupitertakes 4 min—
Dec 25 00:06 UTCGanymede's transit endstakes 10 min—
Dec 25 07:42 UTCEuropa disappears into Jupiter's shadowtakes 4 min—
Dec 25 12:50 UTCEuropa reappears from behind Jupitertakes 4 min—
Dec 25 15:16 UTCIo's shadow enters the disctakes 4 min—
Dec 25 16:27 UTCIo begins its transit across the disctakes 4 min—
Dec 25 17:30 UTCIo's shadow leaves the disctakes 3 min—
Dec 25 18:42 UTCIo's transit endstakes 4 min—
Dec 26 12:22 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 26 15:51 UTCIo reappears from behind Jupitertakes 4 min—
Dec 27 01:52 UTCEuropa's shadow enters the disc—
Dec 27 01:54 UTCEuropa's shadow leaves the disc—
Dec 27 01:56 UTCEuropa's shadow enters the disctakes 4 min—
Dec 27 04:23 UTCEuropa begins its transit across the disctakes 4 min—
Dec 27 04:38 UTCEuropa's shadow leaves the disctakes 3 min—
Dec 27 07:04 UTCEuropa's transit endstakes 4 min—
Dec 27 09:45 UTCIo's shadow enters the disctakes 4 min—
Dec 27 10:55 UTCIo begins its transit across the disctakes 4 min—
Dec 27 11:58 UTCIo's shadow leaves the disctakes 4 min—
Dec 27 13:10 UTCIo's transit endstakes 4 min—
Dec 28 05:55 UTCGanymede disappears into Jupiter's shadowtakes 9 min—
Dec 28 06:50 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 28 09:12 UTCGanymede reappears from Jupiter's shadowtakes 9 min—
Dec 28 10:19 UTCIo reappears from behind Jupitertakes 4 min—
Dec 28 10:58 UTCGanymede disappears behind Jupitertakes 10 min—
Dec 28 14:02 UTCGanymede reappears from behind Jupitertakes 10 min—
Dec 28 20:59 UTCEuropa disappears into Jupiter's shadowtakes 4 min—
Dec 29 02:05 UTCEuropa reappears from behind Jupitertakes 4 min—
Dec 29 04:10 UTCIo's shadow enters the disctakes 7 min—
Dec 29 05:23 UTCIo begins its transit across the disctakes 4 min—
Dec 29 06:26 UTCIo's shadow leaves the disctakes 3 min—
Dec 29 07:37 UTCIo's transit endstakes 4 min—
Dec 30 01:18 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 30 04:47 UTCIo reappears from behind Jupitertakes 4 min—
Dec 30 15:10 UTCEuropa's shadow enters the disctakes 9 min—
Dec 30 17:39 UTCEuropa begins its transit across the disctakes 4 min—
Dec 30 17:56 UTCEuropa's shadow leaves the disctakes 4 min—
Dec 30 20:20 UTCEuropa's transit endstakes 4 min—
Dec 30 22:38 UTCIo's shadow enters the disctakes 9 min—
Dec 30 23:51 UTCIo begins its transit across the disctakes 4 min—
Dec 31 00:54 UTCIo's shadow leaves the disctakes 3 min—
Dec 31 02:05 UTCIo's transit endstakes 4 min—
Dec 31 13:12 UTCCallisto's shadow enters the disc—
Dec 31 13:19 UTCCallisto's shadow leaves the disc—
Dec 31 13:21 UTCCallisto's shadow enters the disctakes 17 min—
Dec 31 16:26 UTCCallisto's shadow leaves the disctakes 14 min—
Dec 31 19:47 UTCIo disappears into Jupiter's shadowtakes 4 min—
Dec 31 19:56 UTCGanymede's shadow enters the disc—
Dec 31 20:01 UTCGanymede's shadow leaves the disc—
Dec 31 20:02 UTCGanymede's shadow enters the disctakes 11 min—
Dec 31 23:15 UTCIo reappears from behind Jupitertakes 4 min—
Dec 31 23:16 UTCGanymede's shadow leaves the disctakes 8 min—

Reading the list

Each disappears / reappears line is the moment the moon's disc is fully in or first out; the "takes N min" is how long the disc takes to cross the edge. Halves that happen behind Jupiter or inside its shadow are left out, since nobody can see them. Positions are from JPL DE431 and the jup365 satellite ephemeris, Jupiter as an oblate spheroid with its shadow cone; mutual-event magnitude drops assume uniform discs and are estimates. Events are geocentric — the same instant everywhere on Earth to well under a second.