NGC 2748 explained

NGC 2748 is a spiral galaxy in the northern circumpolar constellation of Camelopardalis, located at a distance of 18.79Mpc from the Milky Way. It was discovered September 2, 1828 by John Herschel. The morphological classification of SAbc indicates this is an unbarred spiral with moderate to loosely-wound spiral arms. It is a disk-like peculiar galaxy with a stellar shell that is rotating about the main galactic axis. This shell was most likely formed through the capture and disruption of a dwarf companion. The galactic nucleus likely contains a supermassive black hole with a mass of, or 44 million times the mass of the Sun.

Supernovae

A magnitude 14.5 supernova, designated SN 1985A, was discovered in this galaxy on January 25, 1985. It was located west and south of the galaxy's nucleus, and was later classified as a type Ia supernova.
On August 31, 2013, a supernova event was reported at a position west and north of the core of NGC 2748. It was designated SN 2013ff and reached magnitude 15.2. Subsequent studies found a best match to a type Ic supernova.
Kōichi Itagaki announced the discovery of PSN J09132750+7627410 on 10 February 2015. The transient was classified as a luminous blue variable, a type of supernova impostor.^[1]
Supernova SN 2017gkk (type IIb, mag. 14.7) was discovered on 31 August 2017.^[2]

Web site: Asiago spectroscopic observation of PSN J09132750+7627410 . Fox . Derek . 12 February 2015 . The Astronomer's Telegram . 31 August 2024.
Web site: Transient Name Server . SN 2017gkk . . 17 August 2024.