Sky & Telescope - November 2020 - 55

PM 1-333

μ

B161

Σ2819

Σ2816

Σ2813

IC 1396A
B367

B365

B163

B162

B160

p Clockwise from top: This deep color composite of the IC1396 nebula complex displays several dark nebulae, including B161, B365, B160, B162,

SE A N WA LK ER / S&T

B163, and B367 at left. At the top of the field is planetary nebula Preite-Martinez 1-333, while triple-star system Σ2819, double Σ2816, and Σ2813
form a rough line ending within IC 1396A, the Elephant Trunk Nebula at the right.

east-west line plus a dozen fainter stars
scattered mostly to the east and south.
Through my 10-inch reflector at 43×,
NGC 7261 and NGC 7281 share the
field of view and are linked by what I
call the Dit Dit Dit asterism. It consists
of three 3-star lines, all about the same
length. The first is formed by three
10th-magnitude stars (dits) in NGC
7281. Follow this line 22′ west and veer
slightly north to reach the second line,
which points 16′ northwest to the three
brightest stars in NGC 7261.
NGC 7261 is pretty in my 10-inch

scope at 68×, the bright star at its
southeastern edge gleaming with golden
hue. A magnification of 187× reveals
about 25 stars. NGC 7281 shows a few
dozen stars even at low power. A core
group 5′ across includes the cluster's
dit-dit-dit stars. A starry spiral arm
proceeds southward from this group,
curves around through the east, and
then peters out north of the core.
The interesting planetary nebula
Minkowski 2-51 lies 27′ north-northeast of Epsilon. Through my 10-inch
reflector at 68×, it's fairly faint and

shows two superposed stars, the fainter
one pinned to the nebula's southwestern edge. With an O III filter, the planetary yields traces of a darker center.
Taking a closer look with my 15-inch
reflector at 284×, Mink 2-51 is a weakly
annular, north-south oval about ¾′ tall.
The brighter star, magnitude 13.4, rests
a little east of center.
If you have a 20-inch or larger
scope, try to detect the faint halo that
swells Mink 2-51 to 1.2′ and gives it
an overall tilt to the north-northwest.
Don't strain your eyes looking for
sk yandtelescope.org * NOVEMBER 2 02 0

55



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Sky & Telescope - November 2020

Table of Contents for the Digital Edition of Sky & Telescope - November 2020

Contents
Sky & Telescope - November 2020 - Cover1
Sky & Telescope - November 2020 - Cover2
Sky & Telescope - November 2020 - 1
Sky & Telescope - November 2020 - Contents
Sky & Telescope - November 2020 - 3
Sky & Telescope - November 2020 - 4
Sky & Telescope - November 2020 - 5
Sky & Telescope - November 2020 - 6
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Sky & Telescope - November 2020 - Cover3
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