Occult occultations, computed
Location

Jupiter's moons in July 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 · July 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

19 events you can see from New Delhi this month, on 13 nights

Mon
Tue
Wed
Thu
Fri
Sat
Sun
11
2
3
4151
6
718192
10
11
122131
14
15
16
17
18
193
20
21
22
23
24
251262272281
29
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 Sat 1 Jul

  1. Ganymede in Jupiter's shadow
    19:04 disappears → 21:56 reappears · 2 h 52 min
    Jupiter 53° up · daylight

Night of Tue 4 Jul

  1. Io behind Jupiter
    20:13 disappears → reappears unseen · 2 h 16 min
    Jupiter 38° up · dusk

Night of Wed 5 Jul

  1. Io's shadow crosses Jupiter
    18:33 enters → 20:43 leaves · 2 h 10 min
    Jupiter 56° up · daylight

Night of Fri 7 Jul

  1. Europa behind Jupiter
    21:34 disappears → reappears unseen · 2 h 44 min
    Jupiter 18° up · dark sky

Night of Sat 8 Jul

  1. Ganymede behind Jupiter
    18:13 disappears → 21:26 reappears · 3 h 13 min
    Jupiter 58° up · daylight

Night of Sun 9 Jul

  1. Europa's shadow crosses Jupiter
    19:05 enters → 21:39 leaves · 2 h 35 min
    Jupiter 48° up · daylight
  2. Europa's shadow crosses Jupiter
    21:42 enters → 21:44 leaves · 2 min
    Jupiter 15° up · dark sky

Night of Wed 12 Jul

  1. Io crosses Jupiter
    19:19 enters → 21:35 leaves · 2 h 16 min
    Jupiter 43° up · twilight
  2. Io's shadow crosses Jupiter
    20:27 enters → 22:39 leaves · 2 h 13 min
    Jupiter 29° up · dark sky

Night of Thu 13 Jul

  1. Io in Jupiter's shadow
    disappears unseen → 20:01 reappears · 2 h 13 min
    Jupiter 33° up · dusk

Night of Wed 19 Jul

  1. Callisto's shadow crosses Jupiter
    19:33 enters → 19:55 leaves · 21 min
    Jupiter 35° up · twilight
  2. Ganymede's shadow crosses Jupiter
    19:46 enters → 19:51 leaves · 5 min
    Jupiter 32° up · dusk
  3. Io crosses Jupiter
    21:18 enters → 23:33 leaves · 2 h 16 min
    Jupiter 12° up · dark sky

Night of Tue 25 Jul

  1. Europa in Jupiter's shadow
    disappears unseen → 21:03 reappears · 2 h 37 min
    Jupiter 11° up · dark sky

Night of Wed 26 Jul

  1. Ganymede crosses Jupiter
    16:47 enters → 19:57 leaves · 3 h 10 min
    Jupiter 60° up · daylight
  2. Ganymede's shadow crosses Jupiter
    20:54 enters → 23:39 leaves · 2 h 46 min
    Jupiter 12° up · dark sky

Night of Thu 27 Jul

  1. Callisto behind Jupiter
    17:56 disappears → 20:24 reappears · 2 h 28 min
    Jupiter 49° up · daylight
  2. Io behind Jupiter
    20:39 disappears → reappears unseen · 2 h 15 min
    Jupiter 15° up · dark sky

Night of Fri 28 Jul

  1. Io crosses Jupiter
    17:47 enters → 20:03 leaves · 2 h 16 min
    Jupiter 50° up · daylight

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.