Sky and Telescope - May 2017 - 57

Going Deep by Howard Banich

NGC 5529
Spend some time with a most excellent edge-on galaxy this spring.
ou may have never heard of NGC
5529 or looked at it in your own
telescope. But you should find the time
to do it this season, because it's a beautiful galaxy in a beautiful setting.
More specifically, it's a wonderfully
long and thin edge-on galaxy with a
subtle dark lane - just by itself it's a
lovely sight. A lovely foreground triplet
of bright stars in a straight line and a
flotilla of companion galaxies make the
overall view even more irresistible.
Look closely at the image to the
right. The stars are in our Milky Way
galaxy, relatively close by in the context
of the photo. NGC 5529 and its companion galaxies are situated about 138
million light-years away, and the really
faint galaxies in the background are at
least twice as far away. The depth of the
field is mindboggling.
I can't see everything in the photo in
my telescope, unfortunately. But I did
see a quite a bit with the help of dark,
transparent skies and lots of patience -
and so can you.
In 2015, while observing from Likely
Place in northern California, I returned
to NGC 5529, which I'd observed briefly
the year before at the Golden State
Star Party. Observing it several nights
in a row, I was able to see not only the
galaxy's major features, but also eight
companion galaxies in the same field
of view. They became easier to see each
night, too. This seldom fails - knowing
where the companions are and what
they look like makes them easier to see
again. Ever notice this effect yourself?
Each night, I slowly built up my
sketch, starting with the bright foreground stars, then working on NGC
5529, and finally adding the fainter and
apparently smaller companion galaxies.
Each detail added a layer of distance
and time and helped me visualize the
extreme depth of this wonderful view.

PGC 50950
NGC 5529

SDSS J141555.31
+361333.9
PGC 50925
PGC 2076904
Kregel B
PGC 50952

NGC 5529, seen nearly edge-on, slices across the field of view. This sliver of galactic light
lies about 138 million light-years from us. If you've got a moderately high-aperture scope
(8 to 12 inches or so) and dark skies, try for the dim companion galaxies, PGC 50952 and
PGC 50925, both of which lie south of NGC 5529.

5698

14h 35m

+38°

14h 30m

14h 25m

14h 20m

14h 15m
4

a

Star magnitudes

A DA M BLOCK / M OUN T LEM M ON SK YCEN TER / UNIV ERSIT Y OF A RIZON A

Y

BOÖTES

5596

+37°

5675

5654

5557

5616

5572

PGC
50925

PGC
50952

5590
5614

5589

5579
5567
5568

5499
5517

A

5646
5656

5524

5529

+36°

+35°

6
7
8
9
10

5545 5544

5695 5684
5686

5

5533

s k y a n d t e l e s c o p e .c o m

* MAY 2017

57



http://www.skyandtelescope.com

Sky and Telescope - May 2017

Table of Contents for the Digital Edition of Sky and Telescope - May 2017

Contents
Sky and Telescope - May 2017 - Cover1
Sky and Telescope - May 2017 - Cover2
Sky and Telescope - May 2017 - 1
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