Occult occultations, computed
Location

Jupiter's moons in May 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 · May 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

42 events you can see from New Delhi this month, on 20 nights

Mon
Tue
Wed
Thu
Fri
Sat
Sun
13223244
5
62
7
82
9
101113121134
14
151
16
171182193203
21
221
23
24
251263272
28
291
30
31
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 Mon 1 May

  1. Ganymede crosses Jupiter
    16:52 enters → 20:01 leaves · 3 h 09 min
    Jupiter 28° up · daylight
  2. Ganymede's shadow crosses Jupiter
    20:59 enters → 23:58 leaves · 2 h 59 min
    Jupiter 68° up · dark sky
  3. Ganymede's shadow crosses Jupiter
    00:04 enters → 00:08 leaves · 5 min
    Jupiter 40° up · dark sky

Night of Tue 2 May

  1. Io crosses Jupiter
    00:17 enters → 02:32 leaves · 2 h 15 min
    Jupiter 37° up · dark sky
  2. Io's shadow crosses Jupiter
    01:18 enters → 03:32 leaves · 2 h 13 min
    Jupiter 23° up · dark sky

Night of Wed 3 May

  1. Io behind Jupiter
    21:34 disappears → reappears unseen · 2 h 16 min
    Jupiter 65° up · dark sky
  2. Io in Jupiter's shadow
    disappears unseen → 00:52 reappears · 2 h 15 min
    Jupiter 28° up · dark sky

Night of Thu 4 May

  1. Io crosses Jupiter
    18:44 enters → 20:59 leaves · 2 h 15 min
    Jupiter 54° up · daylight
  2. Io's shadow crosses Jupiter
    19:47 enters → 21:59 leaves · 2 h 12 min
    Jupiter 64° up · dusk
  3. Europa behind Jupiter
    22:30 disappears → reappears unseen · 2 h 41 min
    Jupiter 56° up · dark sky
  4. Callisto behind Jupiter
    23:06 disappears → 01:26 reappears · 2 h 21 min
    Jupiter 50° up · dark sky

Night of Sat 6 May

  1. Europa crosses Jupiter
    17:23 enters → 20:06 leaves · 2 h 43 min
    Jupiter 39° up · daylight
  2. Europa's shadow crosses Jupiter
    19:35 enters → 22:15 leaves · 2 h 40 min
    Jupiter 63° up · dusk

Night of Mon 8 May

  1. Ganymede crosses Jupiter
    20:30 enters → 23:40 leaves · 3 h 10 min
    Jupiter 68° up · dark sky
  2. Ganymede's shadow crosses Jupiter
    01:00 enters → 03:57 leaves · 2 h 58 min
    Jupiter 22° up · dark sky

Night of Wed 10 May

  1. Io behind Jupiter
    23:24 disappears → reappears unseen · 2 h 16 min
    Jupiter 41° up · dark sky

Night of Thu 11 May

  1. Io crosses Jupiter
    20:34 enters → 22:49 leaves · 2 h 15 min
    Jupiter 67° up · dark sky
  2. Io's shadow crosses Jupiter
    21:43 enters → 23:53 leaves · 2 h 11 min
    Jupiter 60° up · dark sky
  3. Europa behind Jupiter
    00:55 disappears → reappears unseen · 2 h 42 min
    Jupiter 21° up · dark sky

Night of Fri 12 May

  1. Io in Jupiter's shadow
    disappears unseen → 21:16 reappears · 2 h 15 min
    Jupiter 63° up · dark sky

Night of Sat 13 May

  1. Callisto's shadow crosses Jupiter
    19:09 enters → 20:28 leaves · 1 h 19 min
    Jupiter 64° up · twilight
  2. Europa crosses Jupiter
    19:51 enters → 22:34 leaves · 2 h 43 min
    Jupiter 67° up · dusk
  3. Callisto's shadow crosses Jupiter
    20:40 enters → 20:54 leaves · 14 min
    Jupiter 66° up · dark sky
  4. Europa's shadow crosses Jupiter
    22:13 enters → 00:51 leaves · 2 h 39 min
    Jupiter 53° up · dark sky

Night of Mon 15 May

  1. Ganymede crosses Jupiter
    00:12 enters → 03:23 leaves · 3 h 11 min
    Jupiter 27° up · dark sky

Night of Wed 17 May

  1. Io behind Jupiter
    01:15 disappears → reappears unseen · 2 h 16 min
    Jupiter 11° up · dark sky

Night of Thu 18 May

  1. Io crosses Jupiter
    22:25 enters → 00:40 leaves · 2 h 15 min
    Jupiter 47° up · dark sky
  2. Io's shadow crosses Jupiter
    23:36 enters → 01:49 leaves · 2 h 13 min
    Jupiter 32° up · dark sky

Night of Fri 19 May

  1. Ganymede in Jupiter's shadow
    19:06 disappears → 22:05 reappears · 2 h 58 min
    Jupiter 66° up · twilight
  2. Io behind Jupiter
    19:43 disappears → reappears unseen · 2 h 16 min
    Jupiter 68° up · dusk
  3. Io in Jupiter's shadow
    disappears unseen → 23:11 reappears · 2 h 14 min
    Jupiter 36° up · dark sky

Night of Sat 20 May

  1. Io's shadow crosses Jupiter
    18:05 enters → 20:16 leaves · 2 h 11 min
    Jupiter 58° up · daylight
  2. Europa crosses Jupiter
    22:21 enters → 01:04 leaves · 2 h 43 min
    Jupiter 46° up · dark sky
  3. Europa's shadow crosses Jupiter
    00:49 enters → 03:26 leaves · 2 h 37 min
    Jupiter 14° up · dark sky

Night of Mon 22 May

  1. Europa in Jupiter's shadow
    disappears unseen → 21:42 reappears · 2 h 38 min
    Jupiter 52° up · dark sky

Night of Thu 25 May

  1. Io crosses Jupiter
    00:17 enters → 02:32 leaves · 2 h 15 min
    Jupiter 17° up · dark sky

Night of Fri 26 May

  1. Ganymede behind Jupiter
    17:56 disappears → 21:09 reappears · 3 h 14 min
    Jupiter 60° up · daylight
  2. Io behind Jupiter
    21:36 disappears → reappears unseen · 2 h 16 min
    Jupiter 50° up · dark sky
  3. Ganymede in Jupiter's shadow
    23:06 disappears → 02:03 reappears · 2 h 57 min
    Jupiter 32° up · dark sky

Night of Sat 27 May

  1. Io crosses Jupiter
    18:45 enters → 21:01 leaves · 2 h 15 min
    Jupiter 67° up · daylight
  2. Io's shadow crosses Jupiter
    20:01 enters → 22:11 leaves · 2 h 10 min
    Jupiter 65° up · dusk

Night of Mon 29 May

  1. Europa in Jupiter's shadow
    disappears unseen → 00:17 reappears · 2 h 38 min
    Jupiter 14° 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.