NGC 3888 and NGC 3898 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: NGC 3888 · NGC 3889 · NGC 3898

NGC 3888 and NGC 3898

This unrelated pair of galaxies is located in the constellation of Ursa Major at a declination of +56 degrees.

NGC 3888, at bottom right, is a blue disturbed spiral galaxy located 135 million light years away. It is a magnitude 12 galaxy which spans 1.8 arc-minutes in our apparent view. This corresponds to a diameter of 70,000 light years. I find it fascinating that there are no spiral arms in the bottom half of the disk.

NGC 3898, at upper left, is a double ring spiral galaxy located 135 million light years away. It is a magnitude 11 galaxy which spans 4 arc-minutes in our apparent view. This corresponds to a diameter of 80,000 light years.

NGC 3898 is supposedly one of only a few galaxies we have seen in the universe which have 2 closed outer rings, but these rings don’t quite look closed to me. Closed means looking like a "O", with a void area along the circumference of the inner and outer edges. Instead, they look more like pseudo-rings, which are much more common. Pseudo-rings look like tightly wound spiral arms, forming a rough and not a pure ring.

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Status	Advanced success
Started	...
Astrometry.net job	5770978
PixInsight job	S8V9K4ORP5ZPLJJLGQSQ3BKXJ796ZX1C
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h48m27s.775
RA (top/left)	11h49m44s.301
RA (top/right)	11h46m57s.295
RA (bottom/right)	11h47m11s.881
RA (bottom/left)	11h49m57s.804

Dec (center)	+56°01′49″.92
Dec (top/left)	+56°11′08″.44
Dec (top/right)	+56°08′14″.40
Dec (bottom/right)	+55°52′28″.16
Dec (bottom/left)	+55°55′21″.12

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NGC 3888 and NGC 3898

NGC 3888 and NGC 3898

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NGC 3888 and NGC 3898

NGC 3888 and NGC 3898

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