Sky & Telescope - May 2020 - 27

Pointing my 18-inch
telescope at NGC 4088, I
shared the view with some
novice observers who were
treated to their first-ever
view of an exploding star
in a distant galaxy.
NGC 4088
Diff. = 3 | P = 65× | Dist. = 45 Ml-y

Our last stop in Ursa Major is NGC 4096, a member of
a galaxy group dominated by M106, which lies a little more
than 2o to the east. A nearly edge-on spiral, it's dusty and
somewhat asymmetrical. The core, if you can call it that, is
off-center toward the northern end of the elongated streak,
and its western edge seems a bit detached at the southern end.

Sliding Down into the Hunting Dogs
NGC 4111 lies about 4.5° south of NGC 4096, across the
border in Canes Venatici. It's the brightest in a group of
galaxies that includes 14th-magnitude NGC 4109 and 13thmagnitude NGC 4117. A very attractive edge-on spiral (and
a LINER) with a bright stellar core, it's in the same field with
a pretty double star comprising 8th- and 12th-magnitude
components. The bright core of this galaxy makes it detectable in as little as a 60-mm scope, and it can be fully enjoyed
in an 8-inch scope. A knot at the southern end of the galaxy
might be a faint star.
Around 3.7°, or about one finder field, south-southeast
of NGC 4111 is the Seyfert galaxy NGC 4151. This bright
open-faced spiral is paired with 14th-magnitude NGC 4156.
NGC 4151 is one of the closest galaxies known to harbor
an active supermassive black hole, and some speculate that
it might even host a binary black hole. It also exhibits the
brightest X-ray emission among Seyferts. The X-rays are produced either in a hot plasma cloud surrounding the accretion
disk or in the base of a jet of outflowing matter. The galaxy's
somewhat odd appearance has earned it the moniker the
Eye of Sauron (from The Lord of the Rings). Its bright, round
core looks to be surrounded by a darker ring bounded by two
brighter patches to the northwest and southeast.
Perhaps the most impressive edge-on spiral in the cascade
is NGC 4244, the Silver Needle. As its nickname implies, this
slender streak shows very little central bulging. At more than

NGC 4096
Diff. = 3 | P = 85× | Dist. = 38 Ml-y

NGC 4117

NGC 4109

NGC 4111
Diff. = 2 | P = 100× | Dist. = 42 Ml-y

s k y a n d t e l e s c o p e . o r g * M AY 2 0 2 0

27


http://www.skyandtelescope.org

Sky & Telescope - May 2020

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

Contents
Sky & Telescope - May 2020 - Cover1
Sky & Telescope - May 2020 - Cover2
Sky & Telescope - May 2020 - 1
Sky & Telescope - May 2020 - Contents
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