NGC 1961
NGC 1961 is a spiral galaxy in the constellation Camelopardalis. It was discovered by German-British astronomer William Herschel on 3 December 1788. It was also observed by Guillaume Bigourdan on 22 December 1891, causing it to be listed in the Index Catalogue as IC 2133. Its velocity with respect to the cosmic microwave background for is, which corresponds to a Hubble distance of. However, seven non redshift measurements give a much closer distance of.
The galaxy has been distorted, however no companion has been detected nor double nuclei that could show a recent merger. Its outer arms are highly irregular. Two long straight arms extend from the north side of the galaxy. A luminous X-ray corona has been detected around the galaxy. NGC 1961 is the central member of the small group of nine galaxies, the NGC 1961 group.
Supernovae
Four supernovae have been observed in NGC 1961:- SN 1998eb was discovered by the Lick Observatory Supernova Search on 17 August 1998.
- SN 2001is was discovered by BAO and LOTOSS on 22 December 2001.
- SN 2013cc was discovered by Kōichi Itagaki on 28 April 2013.
- SN 2021vaz was discovered by Kōichi Itagaki on 5 August 2021.