Jupiter's moons in September 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) | Event | Jupiter in your sky |
|---|---|---|
| Sep 1 00:31 UTC | Ganymede's shadow enters the disctakes 10 min | — |
| Sep 1 00:33 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Sep 1 04:02 UTC | Ganymede's shadow leaves the disctakes 8 min | — |
| Sep 1 04:06 UTC | Ganymede's transit endstakes 8 min | — |
| Sep 1 14:27 UTC | Io's shadow enters the disctakes 3 min | — |
| Sep 1 14:28 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 1 16:45 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 1 16:46 UTC | Io's transit endstakes 4 min | — |
| Sep 2 11:39 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 2 13:58 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 2 14:20 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Sep 2 17:14 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Sep 3 08:56 UTC | Io's shadow enters the disctakes 3 min | — |
| Sep 3 08:59 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 3 11:14 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 3 11:17 UTC | Io's transit endstakes 4 min | — |
| Sep 4 06:08 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 4 08:28 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 4 08:46 UTC | Europa's shadow enters the disctakes 3 min | — |
| Sep 4 08:54 UTC | Europa begins its transit across the disctakes 4 min | — |
| Sep 4 11:34 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Sep 4 11:42 UTC | Europa's transit endstakes 4 min | — |
| Sep 4 14:28 UTC | Ganymede disappears into Jupiter's shadowtakes 9 min | — |
| Sep 4 18:17 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| Sep 5 03:24 UTC | Io's shadow enters the disctakes 3 min | — |
| Sep 5 03:29 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 5 05:42 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 5 05:47 UTC | Io's transit endstakes 4 min | — |
| Sep 5 07:22 UTC | Callisto's shadow enters the disctakes 13 min | — |
| Sep 5 08:03 UTC | Callisto begins its transit across the disctakes 11 min | — |
| Sep 5 11:24 UTC | Callisto's shadow leaves the disctakes 12 min | — |
| Sep 5 12:19 UTC | Callisto's transit endstakes 11 min | — |
| Sep 6 00:36 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 6 02:59 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 6 03:38 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Sep 6 06:39 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Sep 6 21:53 UTC | Io's shadow enters the disctakes 3 min | — |
| Sep 6 21:59 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 7 00:11 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 7 00:17 UTC | Io's transit endstakes 4 min | — |
| Sep 7 19:05 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 7 21:29 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 7 22:03 UTC | Europa's shadow enters the disctakes 4 min | — |
| Sep 7 22:18 UTC | Europa begins its transit across the disctakes 4 min | — |
| Sep 8 00:50 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Sep 8 01:06 UTC | Europa's transit endstakes 4 min | — |
| Sep 8 04:30 UTC | Ganymede's shadow enters the disctakes 10 min | — |
| Sep 8 05:01 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Sep 8 08:00 UTC | Ganymede's shadow leaves the disctakes 8 min | — |
| Sep 8 08:33 UTC | Ganymede's transit endstakes 8 min | — |
| Sep 8 16:21 UTC | Io's shadow enters the disctakes 4 min | — |
| Sep 8 16:30 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 8 18:39 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 8 18:48 UTC | Io's transit endstakes 4 min | — |
| Sep 9 13:33 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 9 15:59 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 9 16:56 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Sep 9 20:05 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Sep 10 10:50 UTC | Io's shadow enters the disctakes 4 min | — |
| Sep 10 11:00 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 10 13:08 UTC | Io's shadow leaves the disctakes 4 min | — |
| Sep 10 13:18 UTC | Io's transit endstakes 4 min | — |
| Sep 11 08:02 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 11 10:29 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 11 11:20 UTC | Europa's shadow enters the disctakes 4 min | — |
| Sep 11 11:42 UTC | Europa begins its transit across the disctakes 4 min | — |
| Sep 11 14:07 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Sep 11 14:29 UTC | Europa's transit endstakes 4 min | — |
| Sep 11 18:26 UTC | Ganymede disappears into Jupiter's shadowtakes 9 min | — |
| Sep 11 22:43 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| Sep 12 05:19 UTC | Io's shadow enters the disctakes 4 min | — |
| Sep 12 05:30 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 12 07:36 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 12 07:48 UTC | Io's transit endstakes 4 min | — |
| Sep 13 02:30 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 13 04:59 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 13 06:14 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Sep 13 09:30 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Sep 13 15:24 UTC | Callisto disappears into Jupiter's shadowtakes 12 min | — |
| Sep 13 21:36 UTC | Callisto reappears from behind Jupitertakes 12 min | — |
| Sep 13 23:47 UTC | Io's shadow enters the disctakes 4 min | — |
| Sep 14 00:01 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 14 02:05 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 14 02:19 UTC | Io's transit endstakes 4 min | — |
| Sep 14 20:58 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 14 23:29 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 15 00:37 UTC | Europa's shadow enters the disctakes 6 min | — |
| Sep 15 01:06 UTC | Europa begins its transit across the disctakes 4 min | — |
| Sep 15 03:24 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Sep 15 03:53 UTC | Europa's transit endstakes 4 min | — |
| Sep 15 08:29 UTC | Ganymede's shadow enters the disctakes 11 min | — |
| Sep 15 09:28 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Sep 15 11:58 UTC | Ganymede's shadow leaves the disctakes 8 min | — |
| Sep 15 12:59 UTC | Ganymede's transit endstakes 8 min | — |
| Sep 15 18:16 UTC | Io's shadow enters the disctakes 6 min | — |
| Sep 15 18:31 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 15 20:33 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 15 20:49 UTC | Io's transit endstakes 4 min | — |
| Sep 16 15:27 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 16 17:59 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 16 19:33 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Sep 16 22:55 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Sep 17 12:44 UTC | Io's shadow enters the disctakes 4 min | — |
| Sep 17 13:01 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 17 15:02 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 17 15:19 UTC | Io's transit endstakes 4 min | — |
| Sep 18 09:55 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 18 12:30 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 18 13:54 UTC | Europa's shadow enters the disctakes 4 min | — |
| Sep 18 14:29 UTC | Europa begins its transit across the disctakes 4 min | — |
| Sep 18 16:41 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Sep 18 17:17 UTC | Europa's transit endstakes 4 min | — |
| Sep 18 22:25 UTC | Ganymede disappears into Jupiter's shadowtakes 9 min | — |
| Sep 19 03:09 UTC | Ganymede reappears from behind Jupitertakes 9 min | — |
| Sep 19 07:13 UTC | Io's shadow enters the disctakes 4 min | — |
| Sep 19 07:32 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 19 09:31 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 19 09:49 UTC | Io's transit endstakes 4 min | — |
| Sep 20 04:24 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 20 07:00 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 20 08:51 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Sep 20 12:20 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Sep 21 01:41 UTC | Io's shadow enters the disctakes 6 min | — |
| Sep 21 02:02 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 21 03:59 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 21 04:19 UTC | Io's transit endstakes 4 min | — |
| Sep 21 22:52 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 22 01:21 UTC | Callisto's shadow enters the disctakes 16 min | — |
| Sep 22 01:30 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 22 03:11 UTC | Europa's shadow enters the disctakes 7 min | — |
| Sep 22 03:53 UTC | Europa begins its transit across the disctakes 4 min | — |
| Sep 22 04:40 UTC | Callisto begins its transit across the disctakes 12 min | — |
| Sep 22 05:18 UTC | Callisto's shadow leaves the disctakes 12 min | — |
| Sep 22 05:58 UTC | Europa's shadow leaves the disctakes 4 min | — |
| Sep 22 06:40 UTC | Europa's transit endstakes 4 min | — |
| Sep 22 08:43 UTC | Callisto's transit endstakes 12 min | — |
| Sep 22 12:27 UTC | Ganymede's shadow enters the disctakes 11 min | — |
| Sep 22 13:55 UTC | Ganymede begins its transit across the disctakes 9 min | — |
| Sep 22 15:56 UTC | Ganymede's shadow leaves the disctakes 8 min | — |
| Sep 22 17:24 UTC | Ganymede's transit endstakes 9 min | — |
| Sep 22 20:10 UTC | Io's shadow enters the disctakes 4 min | — |
| Sep 22 20:32 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 22 22:28 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 22 22:50 UTC | Io's transit endstakes 4 min | — |
| Sep 23 17:20 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 23 20:00 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 23 22:09 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Sep 24 01:45 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Sep 24 14:38 UTC | Io's shadow enters the disctakes 4 min | — |
| Sep 24 15:02 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 24 16:56 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 24 17:20 UTC | Io's transit endstakes 4 min | — |
| Sep 25 11:49 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 25 14:30 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 25 16:28 UTC | Europa's shadow enters the disctakes 4 min | — |
| Sep 25 17:17 UTC | Europa begins its transit across the disctakes 4 min | — |
| Sep 25 19:15 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Sep 25 20:04 UTC | Europa's transit endstakes 4 min | — |
| Sep 26 02:24 UTC | Ganymede disappears into Jupiter's shadowtakes 9 min | — |
| Sep 26 07:35 UTC | Ganymede reappears from behind Jupitertakes 9 min | — |
| Sep 26 09:07 UTC | Io's shadow enters the disctakes 7 min | — |
| Sep 26 09:32 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 26 11:25 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 26 11:50 UTC | Io's transit endstakes 4 min | — |
| Sep 27 06:17 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 27 09:00 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 27 11:27 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Sep 27 15:09 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Sep 28 03:35 UTC | Io's shadow enters the disctakes 4 min | — |
| Sep 28 04:03 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 28 05:53 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 28 06:20 UTC | Io's transit endstakes 4 min | — |
| Sep 29 00:46 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 29 03:30 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Sep 29 05:45 UTC | Europa's shadow enters the disctakes 7 min | — |
| Sep 29 06:41 UTC | Europa begins its transit across the disctakes 4 min | — |
| Sep 29 08:32 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Sep 29 09:27 UTC | Europa's transit endstakes 4 min | — |
| Sep 29 16:25 UTC | Ganymede's shadow enters the disctakes 9 min | — |
| Sep 29 18:20 UTC | Ganymede begins its transit across the disctakes 9 min | — |
| Sep 29 19:53 UTC | Ganymede's shadow leaves the disctakes 7 min | — |
| Sep 29 21:48 UTC | Ganymede's transit endstakes 9 min | — |
| Sep 29 22:04 UTC | Io's shadow enters the disctakes 4 min | — |
| Sep 29 22:33 UTC | Io begins its transit across the disctakes 4 min | — |
| Sep 30 00:22 UTC | Io's shadow leaves the disctakes 3 min | — |
| Sep 30 00:50 UTC | Io's transit endstakes 4 min | — |
| Sep 30 09:26 UTC | Callisto disappears into Jupiter's shadowtakes 13 min | — |
| Sep 30 13:13 UTC | Callisto reappears from Jupiter's shadowtakes 13 min | — |
| Sep 30 14:03 UTC | Callisto disappears behind Jupitertakes 13 min | — |
| Sep 30 18:02 UTC | Callisto reappears from behind Jupitertakes 13 min | — |
| Sep 30 19:14 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Sep 30 22:00 UTC | Io reappears from behind Jupitertakes 4 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.