Sky & Telescope - June 2022 - 50
JUNE 2022 OBSERVING
Celestial Calendar
Action at Jupiter
Comet PanSTARRS Arrives
ω
α
June
1
PK 38+12.1
κ
3 5 7 9
6572
IC 4665
11
13 15 17
β
19
21 23
γ
6426
Cr 350
LDN 564
60
6535
η
SER
ζ
IC 1276
6539
τ
ζ
B95
B97
6604
6517
ν
18h 00m
ο
μ
17h 30m
ν
THE PANSTARRS SURVEY at Haleakalā
Observatory in Hawai'i nabbed Comet
C/2017 K2 five years ago when the
object was about halfway between the
orbits of Saturn and Uranus. Even then,
sublimating carbon dioxide, carbon
monoxide, and molecular oxygen had
lofted enough material from the comet's
frigid surface to create a 129,000-kmwide
coma. The outgassing of these
exotic ices indicated that K2 was on its
first visit to the inner solar system from
the Oort Cloud.
Archived images from the CanadaFrance-Hawaii
Telescope revealed
activity as far back as 2013, when
Comet PanSTARRS was beyond Uranus,
at the time making it the most
distant, active, inbound comet ever
found. (That honor recently passed to
Comet Bernardinelli-Bernstein, which
was first imaged in October 2014 at a
distance of 2.3 billion km.)
50 JUNE 2022 * SKY & TELESCOPE
The comet's position is plotted for 0h UT.
Back in mid-February, I saw K2 as a
small, 12th-magnitude fuzzy patch in
my 15-inch scope. The view should be
much improved in June. As the comet
ambles across northern Ophiuchus, it's
well-placed at nightfall and expected to
brighten to about magnitude 8.0.
On June 7th, K2 will pass 1½° north
of the 8th-magnitude planetary nebula
NGC 6572 and ½° south of the bright,
binocular open cluster IC 4665 on the
night of the 20th. The comet swings just
northeast of the bright globular cluster
M10 on the nights of July 14th and 15th
as K2 has its closest approach to Earth.
The comet disappears into evening
twilight around the autumn equinox
but remains in view from the Southern
Hemisphere. Perihelion occurs on
December 19th, when K2 could peak at
6th magnitude.
OPHIUCHUS
17h 00m
ζ
M14
6366
M10
25
27
σ
29 July
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
16h 30m
υ
ψ
-10°
χ
ε
M12
6118
δ
Marfik
λ
σ
0°
9
6384
HERCULES
2
3
4
5
6
7
8
Rasalhague
ι
IC 4593
+10°
AS JUNE BEGINS, Jupiter rises at
around 1:30 a.m. local daylight-saving
time and attains an altitude of roughly
27° at the start of civil twilight. On
June 1st, the big planet gleams brightly
at magnitude -2.3 and in telescopes
presents a disk 37″ across. By month's
end, Jupiter rises before midnight and
climbs to nearly 45° altitude as civil
twilight begins.
Any telescope reveals the four big
Galilean moons, and binoculars usually
show at least two or three. The moons
orbit Jupiter at different rates, changing
positions along an almost straight
line from our point of view on Earth.
Use the diagram on the facing page to
identify them by their relative positions
on any given date and time. All the
observable interactions between Jupiter
and its satellites and their shadows are
tabulated on the facing page.
Features on Jupiter appear closer to
the central meridian than to the limb
for 50 minutes before and after transiting.
Here are the times, in Universal
Time, when the Great Red Spot should
cross Jupiter's central meridian. The
dates, also in UT, are in bold. (Eastern
Daylight Time is UT minus 4 hours.)
May 1: 2:33, 12:29, 22:24; 2: 8:20,
18:16; 3: 4:12, 14:08; 4: 0:04, 9:59,
19:55; 5: 5:51, 15:47; 6: 1:42, 11:38,
21:34; 7: 7:30, 17:25; 8: 3:21, 13:17,
23:13; 9: 9:08, 19:04; 10: 5:00, 14:56;
11: 0:52, 10:47, 20:43; 12: 6:39, 16:35;
13: 2:30, 12:26, 22:22; 14: 8:18, 18:13;
15: 4:09, 14:05; 16: 0:01, 9:56, 19:52;
17: 5:48, 15:44; 18: 1:40, 11:35, 21:31;
19: 7:27, 17:22; 20: 3:18, 13:14, 23:10;
21: 9:05, 19:01; 22: 4:57, 14:53; 23:
0:49, 10:44, 20:40; 24: 6:36, 16:31; 25:
2:27, 12:23, 22:19; 26: 8:14, 18:10; 27:
4:06, 14:02, 23:57; 28: 9:53, 19:49; 29:
5:45, 15:40; 30: 1:36, 11:32, 21:27; 31:
7:23, 17:19
June 1: 3:20, 13:15, 23:11; 2: 9:07,
19:03; 3: 4:58, 14:54; 4: 0:50, 10:46,
20:41; 5: 6:37, 16:33; 6: 2:28, 12:24,
22:20; 7: 8:16, 18:11; 8: 4:07, 14:03,
23:58; 9: 9:54, 19:50; 10: 5:46, 15:41;
11: 1:37, 11:33, 21:29; 12: 7:24, 17:20;
13: 3:16, 13:11, 23:07; 14: 9:03, 18:59;
Star magnitudes
Path of Co
met PanSTA
RRS (C/2017
K2)
Sky & Telescope - June 2022
Table of Contents for the Digital Edition of Sky & Telescope - June 2022
Contents
Sky & Telescope - June 2022 - Cover1
Sky & Telescope - June 2022 - Cover2
Sky & Telescope - June 2022 - 1
Sky & Telescope - June 2022 - Contents
Sky & Telescope - June 2022 - 3
Sky & Telescope - June 2022 - 4
Sky & Telescope - June 2022 - 5
Sky & Telescope - June 2022 - 6
Sky & Telescope - June 2022 - 7
Sky & Telescope - June 2022 - 8
Sky & Telescope - June 2022 - 9
Sky & Telescope - June 2022 - 10
Sky & Telescope - June 2022 - 11
Sky & Telescope - June 2022 - 12
Sky & Telescope - June 2022 - 13
Sky & Telescope - June 2022 - 14
Sky & Telescope - June 2022 - 15
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Sky & Telescope - June 2022 - 17
Sky & Telescope - June 2022 - 18
Sky & Telescope - June 2022 - 19
Sky & Telescope - June 2022 - 20
Sky & Telescope - June 2022 - 21
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Sky & Telescope - June 2022 - 24
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Sky & Telescope - June 2022 - 26
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Sky & Telescope - June 2022 - 28
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Sky & Telescope - June 2022 - 84
Sky & Telescope - June 2022 - Cover3
Sky & Telescope - June 2022 - Cover4
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