Celestial hemisphere:  Southern  ·  Constellation: Cetus (Cet)  ·  Contains:  NGC 720  ·  PGC 3095552  ·  PGC 3097910  ·  PGC 932859  ·  PGC 932975  ·  PGC 933912
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NGC 720, Gary Imm
NGC 720, Gary Imm

NGC 720

Getting plate-solving status, please wait...
NGC 720, Gary Imm
NGC 720, Gary Imm

NGC 720

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Description

This object is an E5 elliptical galaxy located 90 million light years away in the constellation of Cetus at a declination of -14 degrees.  The E5 designation indicates that this elliptical is long and thin (the scale ranges from E0 for round/spherical ellipticals to E7 for the thinnest).  It is a magnitude 10 galaxy which spans 4.5 arc-minutes in our apparent view.  This corresponds to a Milky Way like diameter of 120,000 light years.

I find processing elliptical galaxies to be very difficult.  Minimal processing is required to avoid creating artifact bands in the outer star halo of the galaxy.

A 2005 paper concludes that this galaxy resulted from a merger about 4 billion years ago.  There are 2 distinct stellar populations – an old massive spheroid in the center, and a young disk component around the bulge.   I was hoping to find shells in this galaxy, remnants of the merger, but I did not find any.  Apparently too much time has passed since the merger and any resulting shells have now dissipated.

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