Occult occultations, computed
Location

Jupiter's moons in October 2026

Io · Europa · Ganymede · Callisto — 56 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 · October 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

47 events you can see from New Delhi this month, on 25 nights

Mon
Tue
Wed
Thu
Fri
Sat
Sun
112333
4
5161
7
8391103111121133
14
152
16
172181192203
21
221231241252262275
28
291302311
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 Thu 1 Oct

  1. Europa crosses Jupiter
    01:03 enters → 03:57 leaves · 2 h 54 min
    Jupiter below the horizon

Night of Fri 2 Oct

  1. Ganymede in Jupiter's shadow
    00:57 disappears → 04:32 reappears · 3 h 36 min
    Jupiter below the horizon
  2. Ganymede behind Jupiter
    04:53 disappears → 08:33 reappears · 3 h 40 min
    Jupiter 31° up · dark sky
  3. Io in Jupiter's shadow
    05:11 disappears → reappears unseen · 2 h 18 min
    Jupiter 35° up · dark sky

Night of Sat 3 Oct

  1. Io's shadow crosses Jupiter
    02:35 enters → 04:49 leaves · 2 h 14 min
    Jupiter 2° up · dark sky
  2. Io crosses Jupiter
    03:30 enters → 05:48 leaves · 2 h 18 min
    Jupiter 14° up · dark sky
  3. Great Red Spot crosses the middle of Jupiter
    04:43 · on view 03:53–05:33
    Jupiter 30° up · dark sky

Night of Mon 5 Oct

  1. Callisto crosses Jupiter
    22:22 enters → 03:13 leaves · 4 h 51 min
    Jupiter below the horizon

Night of Tue 6 Oct

  1. Ganymede occults Europa
    04:46 · 5.1 min
    45% of Europa covered · ≈0.2 mag fainter · Jupiter 32° up · dark sky

Night of Thu 8 Oct

  1. Europa's shadow crosses Jupiter
    01:44 enters → 04:36 leaves · 2 h 52 min
    Jupiter below the horizon
  2. Europa crosses Jupiter
    03:48 enters → 06:42 leaves · 2 h 54 min
    Jupiter 21° up · dark sky
  3. Great Red Spot crosses the middle of Jupiter
    03:52 · on view 03:02–04:42
    Jupiter 22° up · dark sky

Night of Fri 9 Oct

  1. Ganymede in Jupiter's shadow
    04:55 disappears → 08:31 reappears · 3 h 36 min
    Jupiter 37° up · dark sky

Night of Sat 10 Oct

  1. Io's shadow crosses Jupiter
    04:27 enters → 06:42 leaves · 2 h 15 min
    Jupiter 31° up · dark sky
  2. Io crosses Jupiter
    05:28 enters → 07:46 leaves · 2 h 18 min
    Jupiter 45° up · dusk
  3. Great Red Spot crosses the middle of Jupiter
    05:31 · on view 04:41–06:21
    Jupiter 45° up · dusk

Night of Sun 11 Oct

  1. Io behind Jupiter
    disappears unseen → 04:55 reappears · 2 h 19 min
    Jupiter 38° up · dark sky

Night of Mon 12 Oct

  1. Europa eclipses Callisto
    04:36 · 7.9 min
    41% of Callisto covered · ≈0.6 mag fainter · Jupiter 34° up · dark sky

Night of Tue 13 Oct

  1. Ganymede crosses Jupiter
    23:26 enters → 03:05 leaves · 3 h 39 min
    Jupiter below the horizon
  2. Great Red Spot crosses the middle of Jupiter
    03:02 · on view 02:12–03:52
    Jupiter 15° up · dark sky
  3. Ganymede occults Callisto
    04:38 · 7.0 min
    27% of Callisto covered · ≈0.1 mag fainter · Jupiter 36° up · dark sky

Night of Thu 15 Oct

  1. Europa's shadow crosses Jupiter
    04:21 enters → 07:11 leaves · 2 h 51 min
    Jupiter 33° up · dark sky
  2. Great Red Spot crosses the middle of Jupiter
    04:40 · on view 03:50–05:30
    Jupiter 38° up · dark sky

Night of Sat 17 Oct

  1. Io eclipses Europa
    04:28 · 3.9 min
    53% of Europa covered · ≈0.8 mag fainter · Jupiter 36° up · dark sky
  2. Europa behind Jupiter
    disappears unseen → 04:28 reappears · 2 h 52 min
    Jupiter 36° up · dark sky

Night of Sun 18 Oct

  1. Io in Jupiter's shadow
    03:26 disappears → reappears unseen · 2 h 18 min
    Jupiter 23° up · dark sky

Night of Mon 19 Oct

  1. Io's shadow crosses Jupiter
    00:48 enters → 03:04 leaves · 2 h 16 min
    Jupiter below the horizon
  2. Io crosses Jupiter
    01:54 enters → 04:12 leaves · 2 h 18 min
    Jupiter 4° up · dark sky

Night of Tue 20 Oct

  1. Ganymede's shadow crosses Jupiter
    23:07 enters → 02:39 leaves · 3 h 32 min
    Jupiter below the horizon
  2. Ganymede crosses Jupiter
    03:38 enters → 07:17 leaves · 3 h 39 min
    Jupiter 28° up · dark sky
  3. Great Red Spot crosses the middle of Jupiter
    03:50 · on view 03:00–04:40
    Jupiter 30° up · dark sky

Night of Thu 22 Oct

  1. Great Red Spot crosses the middle of Jupiter
    05:29 · on view 04:39–06:19
    Jupiter 53° up · dark sky

Night of Fri 23 Oct

  1. Europa occults Ganymede
    02:34 · 9.5 min
    35% of Ganymede covered · ≈0.3 mag fainter · Jupiter 16° up · dark sky

Night of Sat 24 Oct

  1. Io occults Ganymede
    04:16 · 6.9 min
    39% of Ganymede covered · ≈0.3 mag fainter · Jupiter 39° up · dark sky

Night of Sun 25 Oct

  1. Great Red Spot crosses the middle of Jupiter
    02:59 · on view 02:09–03:49
    Jupiter 23° up · dark sky
  2. Io in Jupiter's shadow
    05:20 disappears → reappears unseen · 2 h 18 min
    Jupiter 53° up · dark sky

Night of Mon 26 Oct

  1. Io's shadow crosses Jupiter
    02:42 enters → 04:57 leaves · 2 h 15 min
    Jupiter 20° up · dark sky
  2. Io crosses Jupiter
    03:50 enters → 06:08 leaves · 2 h 18 min
    Jupiter 35° up · dark sky

Night of Tue 27 Oct

  1. Ganymede's shadow crosses Jupiter
    02:54 enters → 02:58 leaves · 4 min
    Jupiter 23° up · dark sky
  2. Ganymede's shadow crosses Jupiter
    03:05 enters → 06:37 leaves · 3 h 32 min
    Jupiter 25° up · dark sky
  3. Io behind Jupiter
    disappears unseen → 03:19 reappears · 2 h 19 min
    Jupiter 28° up · dark sky
  4. Great Red Spot crosses the middle of Jupiter
    04:38 · on view 03:48–05:28
    Jupiter 46° up · dark sky
  5. Ganymede occults Io
    05:06 · 5.4 min
    92% of Io covered · ≈0.5 mag fainter · Jupiter 52° up · dark sky

Night of Thu 29 Oct

  1. Europa eclipses Io
    02:50 · 5.1 min
    35% of Io covered · ≈0.5 mag fainter · Jupiter 23° up · dark sky

Night of Fri 30 Oct

  1. Callisto behind Jupiter
    01:55 disappears → 06:47 reappears · 4 h 52 min
    Jupiter 12° up · dark sky
  2. Great Red Spot crosses the middle of Jupiter
    02:08 · on view 01:18–02:58
    Jupiter 15° up · dark sky

Night of Sat 31 Oct

  1. Europa in Jupiter's shadow
    04:29 disappears → reappears unseen · 2 h 51 min
    Jupiter 47° 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.