NGC 248 [SEP] constellation
NGC 248
NGC 248 is an emission nebula in the Constellation Tucana. It was discovered in 1834 by the astronomer John Frederick William Herschel. NGC 248 is about 60 light-years long and 20 light-years wide
See also.
- List of NGC objects
NGC 5806
NGC 5806 is a barred spiral galaxy in the constellation Virgo.
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 .
Supernovae.
NGC 5806 has also hosted several true supernova. SN 2004dg, around 100 times brighter