My first Magazine Sky & Telescope - 01.2019 | Page 53

Jupiter’s Moons
17, 6:27, 16:23; 18, 2:19, 12:15, 22:10;
19, 8:06, 18:02; 20, 3:58, 13:53, 23:49;
21, 9:45, 19:41; 22, 5:36, 15:32; 23,
1:28, 11:24, 21:20; 24, 7:15, 17:11; 25,
3:07, 13:03, 22:58; 26, 8:54, 18:50; 27,
4:46, 14:41; 28, 0:37, 10:33, 20:29; 29,
6:24, 16:20; 30, 2:16, 12:12, 22:07; 31,
8:03, 17:59.
These times assume that the spot will
be centered at System II longitude 294°.
If the Red Spot has moved elsewhere, it
will transit 1 2 / 3 minutes earlier for each
degree less than 294° and 1 2 / 3 minutes
later for each degree more than 294°.
Features on Jupiter appear closer to
the central meridian than to the limb
for 50 minutes before and after transit-
ing. A light blue or green fi lter increases
the contrast and visibility of Jupiter’s
reddish and brownish markings.
Jan 1
2
3
WEST
EAST
4
5
6
Phenomena of Jupiter’s Moons, January 2019
Jan. 1
Jan. 2
Jan. 3
Jan. 4
Jan. 5
Jan. 6
Jan. 7
Jan. 8
Jan. 9
4:08
6:55
22:37
0:36
1:01
1:16
1:52
3:09
3:27
4:04
14:43
15:56
17:03
18:18
22:36
1:25
19:45
20:23
21:55
22:34
8:54
12:36
17:05
19:55
12:22
14:13
14:20
14:53
14:59
16:24
17:04
17:06
4:01
5:19
6:20
7:42
11:33
14:25
8:42
9:23
10:52
11:34
22:12
2:00
6:02
8:55
2:35
3:10
I.Ec.D
I.Oc.R
III.Ec.D
III.Ec.R
III.Oc.D
I.Sh.I
I.Tr.I
III.Oc.R
I.Sh.E
I.Tr.E
II.Sh.I
II.Tr.I
II.Sh.E
II.Tr.E
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
I.Tr.E
II.Ec.D
II.Oc.R
I.Ec.D
I.Oc.R
III.Sh.I
I.Sh.I
III.Sh.E
I.Tr.I
III.Tr.I
I.Sh.E
I.Tr.E
III.Tr.E
II.Sh.I
II.Tr.I
II.Sh.E
II.Tr.E
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
I.Tr.E
II.Ec.D
II.Oc.R
I.Ec.D
I.Oc.R
III.Ec.D
I.Sh.I
Jan. 10
Jan. 11
Jan. 12
Jan. 13
Jan. 14
Jan. 15
Jan. 16
3:53
4:35
5:21
5:25
6:04
7:33
17:18
18:43
19:37
21:05
0:30
3:25
21:39
22:23
23:49
0:34
11:30
15:24
18:58
21:55
16:07
16:20
16:53
18:18
18:19
19:04
19:23
21:30
6:35
8:05
8:54
10:28
13:27
16:24
10:35
11:23
12:46
13:34
0:48
4:48
7:55
10:54
5:04
5:52
6:32
7:15
8:04
8:33
I.Tr.I
III.Ec.R
I.Sh.E
III.Oc.D
I.Tr.E
III.Oc.R
II.Sh.I
II.Tr.I
II.Sh.E
II.Tr.E
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
I.Tr.E
II.Ec.D
II.Oc.R
I.Ec.D
I.Oc.R
I.Sh.I
III.Sh.I
I.Tr.I
I.Sh.E
III.Sh.E
I.Tr.E
III.Tr.I
III.Tr.E
II.Sh.I
II.Tr.I
II.Sh.E
II.Tr.E
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
I.Tr.E
II.Ec.D
II.Oc.R
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
III.Ec.D
I.Sh.E
I.Tr.E
III.Ec.R
Jan. 17
Jan. 18
Jan. 19
Jan. 20
Jan. 21
Jan. 22
Jan. 23
Jan. 24
9:48
11:56
19:51
21:28
22:11
23:51
2:23
5:24
23:32
0:22
1:43
2:33
14:05
18:12
20:52
23:54
18:01
18:52
20:11
20:17
21:03
22:17
23:44
1:51
9:08
10:50
11:28
13:13
15:20
18:23
12:29
13:22
14:40
15:33
3:23
7:36
9:48
12:53
6:58
7:52
9:08
10:03
10:31
12:33
14:09
16:18
22:25
0:13
III.Oc.D
III.Oc.R
II.Sh.I
II.Tr.I
II.Sh.E
II.Tr.E
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
I.Tr.E
II.Ec.D
II.Oc.R
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
III.Sh.I
I.Tr.E
III.Sh.E
III.Tr.I
III.Tr.E
II.Sh.I
II.Tr.I
II.Sh.E
II.Tr.E
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
I.Tr.E
II.Ec.D
II.Oc.R
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
I.Tr.E
III.Ec.D
III.Ec.R
III.Oc.D
III.Oc.R
II.Sh.I
II.Tr.I
Jan. 25
Jan. 26
Jan. 27
Jan. 28
Jan. 29
Jan. 30
Jan. 31
0:45
2:35
4:17
7:23
1:26
2:22
3:37
4:33
16:40
20:59
22:45
1:52
19:55
20:51
22:05
23:02
0:14
2:15
4:04
6:11
11:42
13:34
14:02
15:57
17:13
20:22
14:23
15:21
16:34
17:32
5:58
10:22
11:41
14:51
8:51
9:51
11:02
12:02
14:28
16:31
18:27
20:37
0:59
2:56
3:19
5:19
6:10
9:21
II.Sh.E
II.Tr.E
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
I.Tr.E
II.Ec.D
II.Oc.R
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
I.Tr.E
III.Sh.I
III.Sh.E
III.Tr.I
III.Tr.E
II.Sh.I
II.Tr.I
II.Sh.E
II.Tr.E
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
I.Tr.E
II.Ec.D
II.Oc.R
I.Ec.D
I.Oc.R
I.Sh.I
I.Tr.I
I.Sh.E
I.Tr.E
III.Ec.D
III.Ec.R
III.Oc.D
III.Oc.R
II.Sh.I
II.Tr.I
II.Sh.E
II.Tr.E
I.Ec.D
I.Oc.R
Every day, interesting events happen between Jupiter’s satellites and the planet’s disk or shadow. The first columns give the
date and mid-time of the event, in Universal Time (which is 5 hours ahead of Eastern Standard Time). Next is the satellite
involved: I for Io, II Europa, III Ganymede, or IV Callisto. Next is the type of event: Oc for an occultation of the satellite behind
Jupiter’s limb, Ec for an eclipse by Jupiter’s shadow, Tr for a transit across the planet’s face, or Sh for the satellite casting its
own shadow onto Jupiter. An occultation or eclipse begins when the satellite disappears (D) and ends when it reappears (R ).
A transit or shadow passage begins at ingress (I) and ends at egress (E ). Each event is gradual, taking up to several minutes.
Predictions courtesy IMCCE / Paris Observatory.
7
8
Europa
9
10
Callisto
11
12
13
14
15
Io
Ganymede
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
The wavy lines represent Jupiter’s four big satellites. The
central vertical band is Jupiter itself. Each gray or black
horizontal band is one day, from 0 h (upper edge of band)
to 24 h UT (GMT). UT dates are at left. Slide a paper’s edge
down to your date and time, and read across to see the
satellites’ positions east or west of Jupiter.
sk yandtele scope.com • JA N UA RY 2 019
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