Occult occultations, computed
Location

Jupiter's moons in December 2026

Io · Europa · Ganymede · Callisto — 41 mutual events

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. This is a mutual-event season — the moons' orbits are edge-on to the Sun and they eclipse and occult each other. Pick your place: the calendar and the nights keep only what your sky shows.

Where the moons are

Jupiter · December 2026

Jupiter's equator horizontal, east to the left as in binoculars. Drag through the month, or tap any event below to jump there; full screen (⤢) steps through a single night a minute at a time. Moons behind the planet fade, a moon in Jupiter's shadow is an empty ring, and a shadow on the disc is placed from the listed times. Positions ±0.1 Jupiter radii — for the picture; the times come from JPL.

Events

97 events you can see from New Delhi this month, on 30 nights

Mon
Tue
Wed
Thu
Fri
Sat
Sun
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behind the planetin its shadowcrossing its faceshadow on the planetmoons eclipse or hide each otherGreat Red Spot mid-disc

Times in IST, when the moon's centre crosses the edge — as almanacs list them. A night runs from noon to noon. Tap an event to see it in the diagram.

Night of Wed 2 Dec

  1. Ganymede's shadow crosses Jupiter
    22:54 enters → 02:26 leaves · 3 h 32 min
    Jupiter below the horizon
  2. Callisto in Jupiter's shadow
    02:20 disappears → 07:06 reappears · 4 h 47 min
    Jupiter 43° up · dark sky
  3. Ganymede eclipses Callisto
    02:22 · 8.8 min
    100% of Callisto covered · ≈5.7 mag fainter · Jupiter 44° up · dark sky
  4. Ganymede eclipses Europa
    03:18 · 5.1 min
    68% of Europa covered · ≈1.3 mag fainter · Jupiter 56° up · dark sky
  5. Ganymede crosses Jupiter
    03:42 enters → 07:20 leaves · 3 h 38 min
    Jupiter 61° up · dark sky
  6. Europa in Jupiter's shadow
    03:59 disappears → reappears unseen · 2 h 51 min
    Jupiter 64° up · dark sky
  7. Great Red Spot crosses the middle of Jupiter
    04:25 · on view 03:35–05:15
    Jupiter 69° up · dark sky
  8. Europa eclipses Callisto
    06:24 · 18.4 min
    18% of Callisto covered · ≈0.2 mag fainter · Jupiter 70° up · dusk

Night of Thu 3 Dec

  1. Great Red Spot crosses the middle of Jupiter
    00:17 · on view 23:27–01:07
    Jupiter 17° up · dark sky
  2. Io in Jupiter's shadow
    03:44 disappears → reappears unseen · 2 h 18 min
    Jupiter 62° up · dark sky
  3. Europa eclipses Callisto
    03:58 · 14.5 min
    42% of Callisto covered · ≈0.6 mag fainter · Jupiter 65° up · dark sky

Night of Fri 4 Dec

  1. Europa's shadow crosses Jupiter
    22:30 enters → 01:20 leaves · 2 h 50 min
    Jupiter below the horizon
  2. Europa crosses Jupiter
    00:54 enters → 03:47 leaves · 2 h 53 min
    Jupiter 26° up · dark sky
  3. Io's shadow crosses Jupiter
    01:04 enters → 03:19 leaves · 2 h 15 min
    Jupiter 29° up · dark sky
  4. Io crosses Jupiter
    02:13 enters → 04:30 leaves · 2 h 17 min
    Jupiter 44° up · dark sky
  5. Great Red Spot crosses the middle of Jupiter
    06:04 · on view 05:14–06:54
    Jupiter 72° up · dusk

Night of Sat 5 Dec

  1. Europa occults Ganymede
    00:48 · 17.8 min
    33% of Ganymede covered · ≈0.3 mag fainter · Jupiter 26° up · dark sky
  2. Io behind Jupiter
    disappears unseen → 01:44 reappears · 2 h 19 min
    Jupiter 38° up · dark sky
  3. Great Red Spot crosses the middle of Jupiter
    01:55 · on view 01:05–02:45
    Jupiter 41° up · dark sky

Night of Sun 6 Dec

  1. Europa occults Ganymede
    03:56 · 75.8 min
    32% of Ganymede covered · ≈0.3 mag fainter · Jupiter 66° up · dark sky

Night of Mon 7 Dec

  1. Great Red Spot crosses the middle of Jupiter
    03:34 · on view 02:44–04:24
    Jupiter 63° up · dark sky

Night of Tue 8 Dec

  1. Great Red Spot crosses the middle of Jupiter
    23:25 · on view 22:35–00:15
    Jupiter 10° up · dark sky

Night of Wed 9 Dec

  1. Ganymede's shadow crosses Jupiter
    02:40 enters → 02:44 leaves · 4 min
    Jupiter 54° up · dark sky
  2. Ganymede's shadow crosses Jupiter
    02:51 enters → 06:23 leaves · 3 h 32 min
    Jupiter 56° up · dark sky
  3. Great Red Spot crosses the middle of Jupiter
    05:12 · on view 04:22–06:02
    Jupiter 75° up · dark sky
  4. Ganymede eclipses Europa
    06:28 · 4.2 min
    36% of Europa covered · ≈0.5 mag fainter · Jupiter 65° up · dusk
  5. Europa in Jupiter's shadow
    06:32 disappears → reappears unseen · 2 h 51 min
    Jupiter 64° up · dusk

Night of Thu 10 Dec

  1. Great Red Spot crosses the middle of Jupiter
    01:03 · on view 00:13–01:53
    Jupiter 33° up · dark sky
  2. Io in Jupiter's shadow
    05:38 disappears → reappears unseen · 2 h 18 min
    Jupiter 72° up · dark sky

Night of Fri 11 Dec

  1. Callisto crosses Jupiter
    23:43 enters → 04:22 leaves · 4 h 39 min
    Jupiter 17° up · dark sky
  2. Europa's shadow crosses Jupiter
    01:04 enters → 03:56 leaves · 2 h 52 min
    Jupiter 35° up · dark sky
  3. Io's shadow crosses Jupiter
    02:55 enters → 05:11 leaves · 2 h 16 min
    Jupiter 58° up · dark sky
  4. Europa crosses Jupiter
    03:24 enters → 06:17 leaves · 2 h 53 min
    Jupiter 64° up · dark sky
  5. Io crosses Jupiter
    04:03 enters → 06:20 leaves · 2 h 17 min
    Jupiter 71° up · dark sky

Night of Sat 12 Dec

  1. Europa eclipses Ganymede
    23:48 · 10.9 min
    9% of Ganymede covered · ≈0.1 mag fainter · Jupiter 19° up · dark sky
  2. Io in Jupiter's shadow
    00:06 disappears → reappears unseen · 2 h 18 min
    Jupiter 23° up · dark sky
  3. Great Red Spot crosses the middle of Jupiter
    02:42 · on view 01:52–03:32
    Jupiter 56° up · dark sky
  4. Io behind Jupiter
    disappears unseen → 03:34 reappears · 2 h 19 min
    Jupiter 67° up · dark sky
  5. Europa occults Ganymede
    04:56 · 23.5 min
    35% of Ganymede covered · ≈0.3 mag fainter · Jupiter 75° up · dark sky

Night of Sun 13 Dec

  1. Ganymede behind Jupiter
    21:16 disappears → 00:55 reappears · 3 h 39 min
    Jupiter below the horizon
  2. Io's shadow crosses Jupiter
    21:24 enters → 23:40 leaves · 2 h 16 min
    Jupiter below the horizon
  3. Io crosses Jupiter
    22:30 enters → 00:47 leaves · 2 h 17 min
    Jupiter 3° up · dark sky
  4. Europa occults Ganymede
    00:50 · 30.5 min
    8% of Ganymede covered · ≈0.1 mag fainter · Jupiter 33° up · dark sky
  5. Europa behind Jupiter
    disappears unseen → 00:53 reappears · 2 h 50 min
    Jupiter 34° up · dark sky

Night of Mon 14 Dec

  1. Great Red Spot crosses the middle of Jupiter
    04:20 · on view 03:30–05:10
    Jupiter 74° up · dark sky

Night of Tue 15 Dec

  1. Great Red Spot crosses the middle of Jupiter
    00:11 · on view 23:21–01:01
    Jupiter 26° up · dark sky

Night of Wed 16 Dec

  1. Great Red Spot crosses the middle of Jupiter
    05:58 · on view 05:08–06:48
    Jupiter 65° up · dark sky

Night of Thu 17 Dec

  1. Great Red Spot crosses the middle of Jupiter
    01:50 · on view 01:00–02:40
    Jupiter 50° up · dark sky

Night of Fri 18 Dec

  1. Europa's shadow crosses Jupiter
    03:40 enters → 06:32 leaves · 2 h 52 min
    Jupiter 71° up · dark sky
  2. Io's shadow crosses Jupiter
    04:51 enters → 07:05 leaves · 2 h 14 min
    Jupiter 74° up · dark sky
  3. Europa crosses Jupiter
    05:51 enters → 08:44 leaves · 2 h 53 min
    Jupiter 65° up · dark sky
  4. Io crosses Jupiter
    05:51 enters → 08:09 leaves · 2 h 17 min
    Jupiter 65° up · dark sky

Night of Sat 19 Dec

  1. Callisto in Jupiter's shadow
    20:19 disappears → 01:05 reappears · 4 h 46 min
    Jupiter below the horizon
  2. Io in Jupiter's shadow
    02:00 disappears → reappears unseen · 2 h 18 min
    Jupiter 54° up · dark sky
  3. Great Red Spot crosses the middle of Jupiter
    03:28 · on view 02:38–04:18
    Jupiter 70° up · dark sky
  4. Europa eclipses Ganymede
    03:54 · 11.9 min
    6% of Ganymede covered · ≈0.1 mag fainter · Jupiter 73° up · dark sky
  5. Io behind Jupiter
    disappears unseen → 05:23 reappears · 2 h 19 min
    Jupiter 69° up · dark sky
  6. Callisto behind Jupiter
    06:34 disappears → 11:16 reappears · 4 h 42 min
    Jupiter 56° up · dusk

Night of Sun 20 Dec

  1. Ganymede in Jupiter's shadow
    20:37 disappears → 00:14 reappears · 3 h 37 min
    Jupiter below the horizon
  2. Europa occults Ganymede
    22:38 · 22.9 min
    3% of Ganymede covered · ≈0.0 mag fainter · Jupiter 10° up · dark sky
  3. Io's shadow crosses Jupiter
    23:18 enters → 01:33 leaves · 2 h 15 min
    Jupiter 19° up · dark sky
  4. Great Red Spot crosses the middle of Jupiter
    23:19 · on view 22:29–00:09
    Jupiter 19° up · dark sky
  5. Io eclipses Ganymede
    23:40 · 5.0 min
    29% of Ganymede covered · ≈0.4 mag fainter · Jupiter 24° up · dark sky
  6. Io crosses Jupiter
    00:18 enters → 02:36 leaves · 2 h 17 min
    Jupiter 32° up · dark sky
  7. Ganymede behind Jupiter
    00:55 disappears → 04:34 reappears · 3 h 39 min
    Jupiter 40° up · dark sky
  8. Europa behind Jupiter
    disappears unseen → 03:17 reappears · 2 h 50 min
    Jupiter 69° up · dark sky

Night of Mon 21 Dec

  1. Io behind Jupiter
    disappears unseen → 23:50 reappears · 2 h 19 min
    Jupiter 27° up · dark sky
  2. Great Red Spot crosses the middle of Jupiter
    05:06 · on view 04:16–05:56
    Jupiter 71° up · dark sky

Night of Tue 22 Dec

  1. Great Red Spot crosses the middle of Jupiter
    00:57 · on view 00:07–01:47
    Jupiter 43° up · dark sky

Night of Wed 23 Dec

  1. Ganymede eclipses Io
    01:38 · 10.6 min
    70% of Io covered · ≈1.3 mag fainter · Jupiter 52° up · dark sky

Night of Thu 24 Dec

  1. Ganymede eclipses Io
    23:32 · 16.5 min
    100% of Io covered · ≈7.5 mag fainter · Jupiter 26° up · dark sky
  2. Great Red Spot crosses the middle of Jupiter
    02:36 · on view 01:46–03:26
    Jupiter 65° up · dark sky

Night of Fri 25 Dec

  1. Great Red Spot crosses the middle of Jupiter
    22:27 · on view 21:37–23:17
    Jupiter 12° up · dark sky
  2. Europa's shadow crosses Jupiter
    06:17 enters → 09:08 leaves · 2 h 51 min
    Jupiter 55° up · dusk
  3. Io's shadow crosses Jupiter
    06:41 enters → 08:58 leaves · 2 h 16 min
    Jupiter 49° up · dusk

Night of Sat 26 Dec

  1. Io in Jupiter's shadow
    03:54 disappears → reappears unseen · 2 h 18 min
    Jupiter 75° up · dark sky
  2. Great Red Spot crosses the middle of Jupiter
    04:14 · on view 03:24–05:04
    Jupiter 74° up · dark sky

Night of Sun 27 Dec

  1. Great Red Spot crosses the middle of Jupiter
    00:05 · on view 23:15–00:55
    Jupiter 36° up · dark sky
  2. Ganymede in Jupiter's shadow
    00:35 disappears → 04:12 reappears · 3 h 37 min
    Jupiter 42° up · dark sky
  3. Europa in Jupiter's shadow
    00:54 disappears → reappears unseen · 2 h 50 min
    Jupiter 46° up · dark sky
  4. Io's shadow crosses Jupiter
    01:09 enters → 03:26 leaves · 2 h 17 min
    Jupiter 50° up · dark sky
  5. Io crosses Jupiter
    02:06 enters → 04:23 leaves · 2 h 17 min
    Jupiter 61° up · dark sky
  6. Io eclipses Ganymede
    02:20 · 5.2 min
    48% of Ganymede covered · ≈0.7 mag fainter · Jupiter 64° up · dark sky
  7. Ganymede behind Jupiter
    04:29 disappears → 08:08 reappears · 3 h 39 min
    Jupiter 73° up · dark sky
  8. Europa behind Jupiter
    disappears unseen → 05:38 reappears · 2 h 50 min
    Jupiter 61° up · dark sky
  9. Callisto's shadow crosses Jupiter
    06:40 enters → 06:44 leaves · 3 min
    Jupiter 48° up · dusk

Night of Mon 28 Dec

  1. Io in Jupiter's shadow
    22:22 disappears → reappears unseen · 2 h 18 min
    Jupiter 14° up · dark sky
  2. Io behind Jupiter
    disappears unseen → 01:38 reappears · 2 h 19 min
    Jupiter 57° up · dark sky
  3. Great Red Spot crosses the middle of Jupiter
    05:52 · on view 05:02–06:42
    Jupiter 57° up · dark sky

Night of Tue 29 Dec

  1. Europa's shadow crosses Jupiter
    19:33 enters → 22:27 leaves · 2 h 54 min
    Jupiter below the horizon
  2. Io crosses Jupiter
    20:32 enters → 22:50 leaves · 2 h 17 min
    Jupiter below the horizon
  3. Europa crosses Jupiter
    21:27 enters → 00:20 leaves · 2 h 53 min
    Jupiter 3° up · dark sky
  4. Great Red Spot crosses the middle of Jupiter
    01:43 · on view 00:53–02:33
    Jupiter 59° up · dark sky

Night of Wed 30 Dec

  1. Ganymede eclipses Io
    05:32 · 18.3 min
    89% of Io covered · ≈2.4 mag fainter · Jupiter 60° up · dark sky

Night of Thu 31 Dec

  1. Ganymede crosses Jupiter
    18:18 enters → 21:55 leaves · 3 h 37 min
    Jupiter below the horizon
  2. Ganymede eclipses Io
    03:16 · 10.8 min
    100% of Io covered · ≈7.5 mag fainter · Jupiter 74° up · dark sky
  3. Great Red Spot crosses the middle of Jupiter
    03:22 · on view 02:32–04:12
    Jupiter 75° up · dark sky

Reading the list

Times are for the moment the moon's centre crosses the edge of Jupiter or of its shadow, the convention of published tables; the moon's own disc takes a few minutes to cross. A start or end marked unseen happens behind Jupiter or inside its shadow. “Only what I can see” keeps events with Jupiter more than 10° up in a dark sky. Positions are from JPL DE431 and the jup365 satellite ephemeris, Jupiter as an oblate spheroid with its shadow cone. Mutual-event brightness drops assume uniform discs and are estimates. Events are geocentric — the same instant everywhere on Earth to well under a second. The Great Red Spot is a storm, not ephemeris: its times are when it crosses the middle of the disc (the central meridian, System II from DE431), taking its longitude as 91° on 1 Jun 2026 drifting 1.75° a month (Sky & Telescope, from the JUPOS drift record). Each degree that estimate is off moves the time by 1.65 min; the spot is well placed for about 50 minutes either side.