NGC 3746 group
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Type Location r.a. dec. Size Magnitude Distance
Galaxy Leo 11h37.73 +22°00.6 14 480 Mly ???

This group of 7 galaxies (actually there are 9 visible but only 7 have NGC designation) is known as the Copeland's septet or Hickson 57.
It lies about 480 million light-years away in the constellation Leo.

From left to right:
Upper group of 3 - NGC 3748, NGC 3745, NGC 3746
Lower group of 3 - NGC 3753, NGC 3754, NGC 3750
Bottom - NGC 3751

The "bright" start is Mag 8

A supernova was discovered April 1st 2005 in NGC 3746 (SN2005BA). It is clearly visible on this image (see finder chart below). 

 

Image data :

Date Telescope Binning Exp Time (s) Special processing Notes
April 16, 2005 Centurion 18" L 1:1
RGB 3:1
L 3x300
RGB 300
Max Entropy, LRGB, DDP