Right ascension 15 00 00.40 Redshift 0.004533 Magnitude 11.7 Apparent magnitude (V) 11.7 | Declination +1° 53′ 27″ Type SBb Constellation Virgo | |
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Distance 69.76 million lightyears Similar NGC 5838, NGC 5668, NGC 5820, NGC 5775, NGC 5879 | ||
NGC 5806 is a barred spiral galaxy in the constellation Virgo.
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Supernova Imposter
NGC 5806 contains a star that was catalogued as a supernova (SN Hunt 248), but turned out to be 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 80,000,000 L☉.
Supernova
NGC 5806 has also hosted a true supernova, SN 2004dg, around 100 times brighter than SN Hunt 248. This was a typical type II supernova. The progenitor has not been detected and is expected to have been a relatively low mass, low luminosity, red supergiant.
References
NGC 5806 Wikipedia(Text) CC BY-SA