NGC 3746 is a large barred spiral galaxy with a ring structure located in the

Leo Leo or Léo may refer to: Acronyms * Law enforcement officer * Law enforcement organisation * ''Louisville Eccentric Observer'', a free weekly newspaper in Louisville, Kentucky * Michigan Department of Labor and Economic Opportunity Arts an ...

constellation. It is located 449 million

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s from the

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and has an approximate

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of 165,000 light-years. NGC 3746 was discovered by Ralph Copeland on 9 February 1874 with subsequent observations made by

Hermann Kobold Hermann Kobold (5 August 1858 – 11 June 1942) was a German astronomer. Biography Hermann Albert Kobold was born in Hanover, Germany, the third of five children of the carpenter August Kobold and his wife Dorothea Kobold (née Brandt). Fro ...

, Lawrence Parsons, 4th Earl of Rosse, Lawrence Parsons and John Louis Emil Dreyer. The luminosity class of NGC 3746 is II and it has a broad H II region with a recessed core (RET).

Supernovae

Two supernovae have been discovered in NGC 3746 so far: SN 2002ar and SN 2005ba. SN 2002ar SN 2002ar 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. It was located 3".3 east and 0".5 south of the nucleus. The supernova was Type Ia supernova, Type la. SN 2005ba SN 2005ba was discovered on 1 April 2005 by Norwegians, Norwegian scientists Arne Danielsen, Mikkel Steine, and Stale Kildahl via unfiltered images taken from a 'Celestron 14' reflector at Veggli, Norway. It was located 14".6 west and 4".0 north of the nucleus. The supernova was Type II supernova, Type II.

Copeland Septet

NGC 3746 is a member of the Copeland Septet which comprises 7 galaxies discovered by Copeland in 1874. The other 6 members are NGC 3748, NGC 3754, NGC 3753, NGC 3750, NGC 3745 and NGC 3751. Together, they are known as Hickson Compact Group, Hickson 57 and Atlas of Peculiar Galaxies, Arp 320.{{Cite web , title=Copeland's Septet (Hickson Compact Group 57) – Constellation Guide , url=https://www.constellation-guide.com/copelands-septet/ , access-date=2024-05-01 , website=www.constellation-guide.com

References

NGC objects, 3746 UGC objects, 6597 Principal Galaxies Catalogue objects, 35997 Barred spiral galaxies Discoveries by Ralph Copeland Astronomical objects discovered in 1874 Arp objects LEDA objects 2MASS objects SDSS objects Hickson Compact Groups Copeland Septet