NGC 3158 Galaxy Group - Shakhbazian 049 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Leo Minor (LMi) · Contains: NGC 3150 · NGC 3151 · NGC 3152 · NGC 3158 · NGC 3159 · NGC 3160 · NGC 3161 · NGC 3163 · PGC 2131950 · PGC 2133053 · PGC 2133300 · PGC 2134458 · PGC 2135428 · PGC 2135625 · PGC 2136677 · PGC 2136940 · PGC 29818 · PGC 29842 · PGC 29849

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NGC 3158 Galaxy Group - Shakhbazian 049

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NGC 3158 Galaxy Group - Shakhbazian 049

This object is a galaxy group located 320 million light years away in the constellation of Leo Minor at a declination of +39 degrees. I have imaged a lot of galaxy groups and this is one of my favorites, even though it is not widely known or imaged. I like the variety of galaxy types and that the galaxies are close enough to see some interesting structure. All of the galaxies that you see that are roughly the same size are part of this group – I count about 10. The smaller galaxies are at least 1 billion light years away and are not part of this group.

The centerpiece of this group is the lovely NGC 3158, a large elliptical galaxy. This 13 magnitude galaxy spans 2 arc-minutes in our apparent view, which corresponds to an actual diameter of 170,000 light years. This galaxy looks more like a lenticular galaxy to me, with a bright core and a bright inner region surrounding by a brighter ring.

Several other amazing galaxies are also visible. NGC 3160 at the top is my favorite. This edge-on spiral has a great dust lane which varies in thickness. I also like the group of 5 face-on NGC galaxies at the bottom, all of which have bright inner regions.

Finally, take a look at PGC 29842, just left of the center of the image. It looks to me like a foreground star is superimposed almost exactly over the galaxy core. If not, that is one oddly bright core!

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ZWO ASI1600MM/QHY163M

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Status	Advanced success
Started	...
Astrometry.net job	3595105
PixInsight job	DQOZOIYELU5SIZT1SHW854VORN3O0PG1
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	10h13m55s.819
RA (top/left)	10h14m47s.666
RA (top/right)	10h13m02s.914
RA (bottom/right)	10h13m04s.183
RA (bottom/left)	10h14m48s.521

Dec (center)	+38°43′32″.93
Dec (top/left)	+38°51′42″.22
Dec (top/right)	+38°51′26″.62
Dec (bottom/right)	+38°35′22″.50
Dec (bottom/left)	+38°35′37″.97

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NGC 3158 Galaxy Group - Shakhbazian 049

NGC 3158 Galaxy Group - Shakhbazian 049

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NGC 3158 Galaxy Group - Shakhbazian 049

NGC 3158 Galaxy Group - Shakhbazian 049

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