Sky and Telescope - June 2015 - 63

spread farther apart in the southern section but are still
in good supply, and my eye wanted to organize them into
curving chains and geometric shapes. Photographs show
the galaxies gradually fanning away toward the south,
and this was also the impression I got in the eyepiece.
One of the more difficult observations was of two
galaxies nearly in contact, PGC 54890 (magnitude
16.7) and PGC 54891 (magnitude 15.7). I never actually saw them as truly separate galaxies, but rather as
an extended blur. I had an even tougher time with PGC
54894 (magnitude 16.4) and its companion, SDSS
J152245.11+273650.7 (magnitude 17.3). They appeared
merely as a combined circular blur.

Southern
Author's sketch
of the southern
region of Abell
2065. It's easy to
lose your way in
this part of the
cluster, so use
the faint foreground stars as
reference points
to find your way
in this deep field
of faint fuzzies.

The Northern Section
There are a considerable number of galaxies to the north
of the rich central area of the cluster. I found them easy
to identify because they're more spread out, and several
fairly prominent foreground stars helped pinpoint their
location. Although this part of 2065 thins out faster than
the southern section, it can be just as challenging.
The brightest galaxy in this part of the cluster is PGC
54868 (magnitude 16.0). All the other galaxies I saw
in here were between magnitude 16 and 17. Interestingly, the faintest object I found in this area was SDSS
J152215.40+274657.0, which although it looked a little
fuzzy in the eyepiece is more likely a magnitude-17.8 star
than a galaxy.

The Toughest Part
A handful of galaxies huddle around the two brightest
foreground stars that mark the northwestern boundary
of the central area of the cluster. Their location reduces
the effectiveness of averted vision because this technique
makes stars look brighter, too. On the most transparent nights, however, I could see many of these galaxies.

PGC 54891
PGC 54890
PGC 54894
SDSS J152245.11+273650.7

Northern

PGC 54868

SDSS J152215.40+274657.0
TYC 2031- 874 -1

MAC 1522+02741G

Author's sketch of northern region of Abell 2065. The bright foreground stars will allow you to star-hop more spryly in this part of the galaxy cluster.

Sk yandTelescope.com June 2015

63



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Sky and Telescope - June 2015

Table of Contents for the Digital Edition of Sky and Telescope - June 2015

Contents
Sky and Telescope - June 2015 - Cover1
Sky and Telescope - June 2015 - Cover2
Sky and Telescope - June 2015 - 3
Sky and Telescope - June 2015 - Contents
Sky and Telescope - June 2015 - 5
Sky and Telescope - June 2015 - A
Sky and Telescope - June 2015 - B
Sky and Telescope - June 2015 - 6
Sky and Telescope - June 2015 - 7
Sky and Telescope - June 2015 - 8
Sky and Telescope - June 2015 - 9
Sky and Telescope - June 2015 - 10
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Sky and Telescope - June 2015 - Cover3
Sky and Telescope - June 2015 - Cover4
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