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NGC 3746

Galaxy in the constellation Leo From Wikipedia, the free encyclopedia

NGC 3746
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NGC 3746 is a large barred spiral galaxy with a ring structure[2] located in the Leo constellation.[3] It is located 449 million light-years from the Solar System and has an approximate diameter of 45,000 light-years.[1] NGC 3746 was discovered by Ralph Copeland on 9 February 1874 with subsequent observations made by Hermann Kobold, Lawrence Parsons and John Louis Emil Dreyer.[4]

Quick facts Observation data (J2000 epoch), Constellation ...

The luminosity class of NGC 3746 is II and it has a broad H II region with a recessed core (RET).[1]

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Copeland Septet

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Copeland Septet with NGC 3746 in bottom right, imaged by Mount Lemmon Observatory

NGC 3746 is a member of the Copeland Septet which comprises 7 galaxies discovered by Copeland in 1874.[5] The other 6 members are NGC 3745, NGC 3748, NGC 3750, NGC 3751, NGC 3753, and NGC 3754. Together, they are known as Hickson 57 and Arp 320.[6]

Supernovae

Two supernovae have been discovered in NGC 3746:

  • SN 2002ar (Type Ia, mag. 16.5)[7] was discovered by Dr W. D. Li from the University of California, Berkeley via unfiltered CCD images which was taken by the 0.8-m Katzman Automatic Imagining Telescope on 3 and 4 February 2002.[8] It was located 3".3 east and 0".5 south of the nucleus.[8][9]
  • SN 2005ba (Type II, mag. 17.5)[10] was discovered on 1 April 2005 by Norwegian scientists Arne Danielsen, Mikkel Steine, and Stale Kildahl via unfiltered images taken from a 'Celestron 14' reflector at Veggli, Norway.[11] It was located 14".6 west and 4".0 north of the nucleus.[12][13]
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References

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