NGC 5806

NGC 5806 is an intermediate spiral galaxy in the constellation Virgo. It was discovered by German-British astronomer William Herschel on 24 February 1786. It is located about 70 million light-years away from the Milky Way. It is a member of the NGC 5846 Group.

Supernovae and Imposter

Three supernovae and one supernova imposter have been observed in NGC 5806:SN 2004dg was discovered by Associazione Ternana Astrofili on 19 July 2004. The progenitor of SN 2004dg has not been detected and is expected to have been a relatively low mass, low luminosity, red supergiant.SN 2012P was discovered by Fabio Briganti on 22 January 2012. Originally classified as a TypeIb/c, it was later determined to be Type IIb. Later analysis concluded that the progenitor had an initial mass of 15.2.iPTF13bvn was discovered by the Palomar Transient Factory on 16 June 2013.SN Hunt 248 was discovered by the Catalina Real-time Transient Survey and Stan Howerton on 21 May 2014. It was initially catalogued as a supernova, but was later classified as a supernova imposter. The progenitor was detected as a cool hypergiant with an absolute visual magnitude of −9 and 400,000 times more luminous than the sun. The eruption saw it increase in luminosity to around. Later analysis concluded that this object is a luminous red nova.