Sky & Telescope - April 2023 - 22
Targets in Virgo
SOUTHERN VIRGO SIGHTS
These spring nights explore a
selection of galaxies that trickle
down past Gamma Virginis (Porrima).
Use this chart along with
the coordinates in the table on
page 25 to guide you.
ο
M49
ν
+5°
M61
4496
δ
4636
4527
4536
β
4517
0°
4753
γ
VIRGO
4684
4691
-5°
θ
4731
4958
4699
4759
-10°
Spica
4700
M104
4593
4697
4546
4666 4592
η
2
1
3
4
5
6
7
4457
13h 20m
13h 00m
12h 40m
around 29 million light-years. The galaxies, along with a number
of dwarf galaxy companions, are infalling into the cluster.
Look for NGC 4592, an 11.6-magnitude edge-on spiral
with a brighter center, 1.8° east-southeast of NGC 4517. It's
a convenient stop on our way to NGC 4666, the Superwind
Galaxy, another 1.5° east.
NGC 4666 earns its nickname by virtue of being a starburst
galaxy with a highly energetic superwind of outflowing
gas that's visible in X-ray wavelengths. It's a very bright (magnitude
10.7), edge-on galaxy, that I see having a mottled,
dusty appearance. William described it as " not cometic " (i.e.,
not comet-like) and similar to NGC 4592.
Before continuing southeast to our next target, it would be
a shame not to make a slight detour to enjoy the lovely double
22 APRIL 2023 * SKY & TELESCOPE
12h 20m
12h 00m
star Gamma (γ) Virginis, or Porrima, which is almost 11
/3° to
the southwest. The separation of the binary pair is currently
about 3.3″, putting it within reach of a 3-inch telescope.
Getting back to the galaxies, NGC 4753 lies 1.9° eastsoutheast
of NGC 4666. William's discovery notes describe
it as " a fine nebula, brightest in the M [middle]; pL [pretty
large]; 4 or 5′ extent. It is not quite R [round], but a little
compressed. The middle though vB [very bright] does not
resemble the nucleus of a comet. "
NGC 4753 is a large, bright (magnitude 9.9) oval with an
intense core and a fainter, extended halo best viewed with
averted vision. It's elongated east-west and classified as an
irregular. Images show a complex dust lane that researchers
propose is evidence of its disk being twisted by a process
Star magnitudes
Sky & Telescope - April 2023
Table of Contents for the Digital Edition of Sky & Telescope - April 2023
Contents
Sky & Telescope - April 2023 - Cover1
Sky & Telescope - April 2023 - Cover2
Sky & Telescope - April 2023 - 1
Sky & Telescope - April 2023 - Contents
Sky & Telescope - April 2023 - 3
Sky & Telescope - April 2023 - 4
Sky & Telescope - April 2023 - 5
Sky & Telescope - April 2023 - 6
Sky & Telescope - April 2023 - 7
Sky & Telescope - April 2023 - 8
Sky & Telescope - April 2023 - 9
Sky & Telescope - April 2023 - 10
Sky & Telescope - April 2023 - 11
Sky & Telescope - April 2023 - 12
Sky & Telescope - April 2023 - 13
Sky & Telescope - April 2023 - 14
Sky & Telescope - April 2023 - 15
Sky & Telescope - April 2023 - 16
Sky & Telescope - April 2023 - 17
Sky & Telescope - April 2023 - 18
Sky & Telescope - April 2023 - 19
Sky & Telescope - April 2023 - 20
Sky & Telescope - April 2023 - 21
Sky & Telescope - April 2023 - 22
Sky & Telescope - April 2023 - 23
Sky & Telescope - April 2023 - 24
Sky & Telescope - April 2023 - 25
Sky & Telescope - April 2023 - 26
Sky & Telescope - April 2023 - 27
Sky & Telescope - April 2023 - 28
Sky & Telescope - April 2023 - 29
Sky & Telescope - April 2023 - 30
Sky & Telescope - April 2023 - 31
Sky & Telescope - April 2023 - 32
Sky & Telescope - April 2023 - 33
Sky & Telescope - April 2023 - 34
Sky & Telescope - April 2023 - 35
Sky & Telescope - April 2023 - 36
Sky & Telescope - April 2023 - 37
Sky & Telescope - April 2023 - 38
Sky & Telescope - April 2023 - 39
Sky & Telescope - April 2023 - 40
Sky & Telescope - April 2023 - 41
Sky & Telescope - April 2023 - 42
Sky & Telescope - April 2023 - 43
Sky & Telescope - April 2023 - 44
Sky & Telescope - April 2023 - 45
Sky & Telescope - April 2023 - 46
Sky & Telescope - April 2023 - 47
Sky & Telescope - April 2023 - 48
Sky & Telescope - April 2023 - 49
Sky & Telescope - April 2023 - 50
Sky & Telescope - April 2023 - 51
Sky & Telescope - April 2023 - 52
Sky & Telescope - April 2023 - 53
Sky & Telescope - April 2023 - 54
Sky & Telescope - April 2023 - 55
Sky & Telescope - April 2023 - 56
Sky & Telescope - April 2023 - 57
Sky & Telescope - April 2023 - 58
Sky & Telescope - April 2023 - 59
Sky & Telescope - April 2023 - 60
Sky & Telescope - April 2023 - 61
Sky & Telescope - April 2023 - 62
Sky & Telescope - April 2023 - 63
Sky & Telescope - April 2023 - 64
Sky & Telescope - April 2023 - 65
Sky & Telescope - April 2023 - 66
Sky & Telescope - April 2023 - 67
Sky & Telescope - April 2023 - 68
Sky & Telescope - April 2023 - 69
Sky & Telescope - April 2023 - 70
Sky & Telescope - April 2023 - 71
Sky & Telescope - April 2023 - 72
Sky & Telescope - April 2023 - 73
Sky & Telescope - April 2023 - 74
Sky & Telescope - April 2023 - 75
Sky & Telescope - April 2023 - 76
Sky & Telescope - April 2023 - 77
Sky & Telescope - April 2023 - 78
Sky & Telescope - April 2023 - 79
Sky & Telescope - April 2023 - 80
Sky & Telescope - April 2023 - 81
Sky & Telescope - April 2023 - 82
Sky & Telescope - April 2023 - 83
Sky & Telescope - April 2023 - 84
Sky & Telescope - April 2023 - Cover3
Sky & Telescope - April 2023 - Cover4
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