Arp 174 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: NGC 3068 · PGC 1845517 · PGC 1846743 · PGC 87670

Arp 174

This object, also known as NGC 3068, is a pair of interacting galaxies located 300 million light years away in the constellation of Leo at a declination of +29 degrees. The large galaxy of the pair is UGC 5353, while the smaller galaxy just below and to the right is LEDA 87670. This galaxy was classified by Dr. Arp into the category of Galaxies – Narrow Counter-tails.

Magnitude 15.4 UGC 5353 spans 0.7 arc-minutes in our apparent view, which corresponds to a diameter of 60,000 light years. The smaller galaxy is about half as large.

The faint star stream tidal plume is the star of the show here. It extends for over 300,000 light years below the small companion. Visually, the plume looks like it extends further downward than would be possible due to gravitational forces between these two galaxies. But the dynamics involved as two galaxies like this pass each other are significant and can lead to very long extended plumes.

Now, I know what you're thinking. Perhaps the galaxy at the bottom left of the image, 2MASX J09585761+2846226, is also impacting that star stream. But this galaxy is much further away at almost 1 billion light years.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	4186271
PixInsight job	TFYEBLX3YLKE8W6JWJVHV7RQZIO8PSUA
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	09h58m37s.459
RA (top/left)	09h59m08s.866
RA (top/right)	09h58m01s.561
RA (bottom/right)	09h58m06s.120
RA (bottom/left)	09h59m13s.296

Dec (center)	+28°50′58″.17
Dec (top/left)	+28°57′14″.20
Dec (top/right)	+28°55′56″.43
Dec (bottom/right)	+28°44′41″.87
Dec (bottom/left)	+28°45′59″.14

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Arp 174

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