Occult occultations, computed
Location

Jupiter's moons in April 2028

Io · Europa · Ganymede · Callisto

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. Pick your place: the calendar and the nights keep only what your sky shows.

Where the moons are

Jupiter · April 2028

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

55 events you can see from New Delhi this month, on 21 nights

Mon
Tue
Wed
Thu
Fri
Sat
Sun
13253244
5
61
7
8194102115121133
14
15
162172184191202
21
22
23
242253263273
28
292
30
behind the planetin its shadowcrossing its faceshadow on the planet

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 Sat 1 Apr

  1. Callisto in Jupiter's shadow
    21:29 disappears → 23:22 reappears · 1 h 53 min
    Jupiter 58° up · dark sky
  2. Io behind Jupiter
    01:31 disappears → reappears unseen · 2 h 15 min
    Jupiter 48° up · dark sky
  3. Io in Jupiter's shadow
    disappears unseen → 04:15 reappears · 2 h 15 min
    Jupiter 13° up · dark sky

Night of Sun 2 Apr

  1. Io crosses Jupiter
    22:43 enters → 00:57 leaves · 2 h 14 min
    Jupiter 67° up · dark sky
  2. Io's shadow crosses Jupiter
    23:12 enters → 01:27 leaves · 2 h 14 min
    Jupiter 67° up · dark sky
  3. Europa behind Jupiter
    00:03 disappears → reappears unseen · 2 h 39 min
    Jupiter 62° up · dark sky
  4. Ganymede crosses Jupiter
    03:06 enters → 06:09 leaves · 3 h 03 min
    Jupiter 27° up · dark sky
  5. Europa in Jupiter's shadow
    disappears unseen → 03:41 reappears · 2 h 39 min
    Jupiter 19° up · dark sky

Night of Mon 3 Apr

  1. Io behind Jupiter
    19:57 disappears → reappears unseen · 2 h 15 min
    Jupiter 42° up · dark sky
  2. Io in Jupiter's shadow
    disappears unseen → 22:44 reappears · 2 h 15 min
    Jupiter 67° up · dark sky

Night of Tue 4 Apr

  1. Io crosses Jupiter
    17:09 enters → 19:24 leaves · 2 h 14 min
    Jupiter 7° up · daylight
  2. Io's shadow crosses Jupiter
    17:41 enters → 19:54 leaves · 2 h 13 min
    Jupiter 14° up · daylight
  3. Europa crosses Jupiter
    18:43 enters → 21:24 leaves · 2 h 41 min
    Jupiter 27° up · twilight
  4. Europa's shadow crosses Jupiter
    19:48 enters → 22:30 leaves · 2 h 42 min
    Jupiter 41° up · dark sky

Night of Thu 6 Apr

  1. Ganymede in Jupiter's shadow
    disappears unseen → 22:13 reappears · 3 h 04 min
    Jupiter 66° up · dark sky

Night of Sat 8 Apr

  1. Io behind Jupiter
    03:16 disappears → reappears unseen · 2 h 16 min
    Jupiter 19° up · dark sky

Night of Sun 9 Apr

  1. Io crosses Jupiter
    00:28 enters → 02:43 leaves · 2 h 14 min
    Jupiter 54° up · dark sky
  2. Callisto crosses Jupiter
    01:03 enters → 02:46 leaves · 1 h 43 min
    Jupiter 47° up · dark sky
  3. Io's shadow crosses Jupiter
    01:07 enters → 03:21 leaves · 2 h 14 min
    Jupiter 46° up · dark sky
  4. Europa behind Jupiter
    02:19 disappears → reappears unseen · 2 h 39 min
    Jupiter 31° up · dark sky

Night of Mon 10 Apr

  1. Io behind Jupiter
    21:43 disappears → reappears unseen · 2 h 16 min
    Jupiter 65° up · dark sky
  2. Io in Jupiter's shadow
    disappears unseen → 00:39 reappears · 2 h 15 min
    Jupiter 51° up · dark sky

Night of Tue 11 Apr

  1. Io crosses Jupiter
    18:55 enters → 21:09 leaves · 2 h 14 min
    Jupiter 36° up · twilight
  2. Io's shadow crosses Jupiter
    19:35 enters → 21:48 leaves · 2 h 13 min
    Jupiter 45° up · dusk
  3. Europa crosses Jupiter
    21:02 enters → 23:43 leaves · 2 h 41 min
    Jupiter 61° up · dark sky
  4. Europa's shadow crosses Jupiter
    22:25 enters → 01:05 leaves · 2 h 41 min
    Jupiter 67° up · dark sky
  5. Europa's shadow crosses Jupiter
    01:08 enters → 01:10 leaves · 2 min
    Jupiter 44° up · dark sky

Night of Wed 12 Apr

  1. Io in Jupiter's shadow
    disappears unseen → 19:07 reappears · 2 h 15 min
    Jupiter 40° up · dusk

Night of Thu 13 Apr

  1. Europa in Jupiter's shadow
    disappears unseen → 19:32 reappears · 2 h 39 min
    Jupiter 46° up · dusk
  2. Ganymede behind Jupiter
    20:11 disappears → reappears unseen · 3 h 07 min
    Jupiter 54° up · dark sky
  3. Ganymede in Jupiter's shadow
    disappears unseen → 02:13 reappears · 3 h 03 min
    Jupiter 29° up · dark sky

Night of Sun 16 Apr

  1. Io crosses Jupiter
    02:14 enters → 04:29 leaves · 2 h 15 min
    Jupiter 26° up · dark sky
  2. Io's shadow crosses Jupiter
    03:01 enters → 05:13 leaves · 2 h 12 min
    Jupiter 15° up · dark sky

Night of Mon 17 Apr

  1. Io behind Jupiter
    23:30 disappears → reappears unseen · 2 h 16 min
    Jupiter 58° up · dark sky
  2. Io in Jupiter's shadow
    disappears unseen → 02:33 reappears · 2 h 15 min
    Jupiter 20° up · dark sky

Night of Tue 18 Apr

  1. Io crosses Jupiter
    20:41 enters → 22:55 leaves · 2 h 15 min
    Jupiter 62° up · dark sky
  2. Io's shadow crosses Jupiter
    21:29 enters → 23:43 leaves · 2 h 14 min
    Jupiter 67° up · dark sky
  3. Europa crosses Jupiter
    23:22 enters → 02:04 leaves · 2 h 42 min
    Jupiter 59° up · dark sky
  4. Europa's shadow crosses Jupiter
    01:02 enters → 03:44 leaves · 2 h 42 min
    Jupiter 39° up · dark sky

Night of Wed 19 Apr

  1. Io in Jupiter's shadow
    disappears unseen → 21:02 reappears · 2 h 15 min
    Jupiter 65° up · dark sky

Night of Thu 20 Apr

  1. Europa in Jupiter's shadow
    disappears unseen → 22:06 reappears · 2 h 39 min
    Jupiter 67° up · dark sky
  2. Ganymede behind Jupiter
    23:37 disappears → 02:46 reappears · 3 h 08 min
    Jupiter 55° up · dark sky

Night of Mon 24 Apr

  1. Ganymede's shadow crosses Jupiter
    17:02 enters → 20:04 leaves · 3 h 02 min
    Jupiter 24° up · daylight
  2. Io behind Jupiter
    01:17 disappears → reappears unseen · 2 h 16 min
    Jupiter 31° up · dark sky

Night of Tue 25 Apr

  1. Io crosses Jupiter
    22:28 enters → 00:43 leaves · 2 h 15 min
    Jupiter 62° up · dark sky
  2. Io's shadow crosses Jupiter
    23:25 enters → 01:37 leaves · 2 h 13 min
    Jupiter 53° up · dark sky
  3. Europa crosses Jupiter
    01:45 enters → 04:27 leaves · 2 h 42 min
    Jupiter 24° up · dark sky

Night of Wed 26 Apr

  1. Io behind Jupiter
    19:45 disappears → reappears unseen · 2 h 16 min
    Jupiter 59° up · dusk
  2. Io in Jupiter's shadow
    disappears unseen → 22:57 reappears · 2 h 15 min
    Jupiter 57° up · dark sky
  3. Callisto's shadow crosses Jupiter
    01:01 enters → 02:48 leaves · 1 h 46 min
    Jupiter 32° up · dark sky

Night of Thu 27 Apr

  1. Io's shadow crosses Jupiter
    17:52 enters → 20:06 leaves · 2 h 13 min
    Jupiter 38° up · daylight
  2. Europa behind Jupiter
    20:07 disappears → reappears unseen · 2 h 41 min
    Jupiter 63° up · dark sky
  3. Europa in Jupiter's shadow
    disappears unseen → 00:41 reappears · 2 h 39 min
    Jupiter 36° up · dark sky

Night of Sat 29 Apr

  1. Europa's shadow crosses Jupiter
    16:58 enters → 19:37 leaves · 2 h 39 min
    Jupiter 28° up · daylight
  2. Europa's shadow crosses Jupiter
    19:40 enters → 19:42 leaves · 2 min
    Jupiter 60° up · dusk

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.