NGC 2115

NGC 2115 is a large lenticular galaxy in the constellation of Pictor. Its velocity with respect to the cosmic microwave background is, which corresponds to a Hubble distance of. It was discovered by British astronomer John Herschel on 4 January 1837.

Pair of interacting galaxies

The apparent magnitude of PGC 18002, the galaxy further south, is 15.1 and was certainly not observed by Herschel. The radial velocities of these two galaxies are almost equal, so they are at the same distance from us and, judging by their shape, they are in gravitational interaction.

Identification

In the NASA/IPAC Extragalactic Database, NGC 2115 appears as a pair of galaxies. To view the data for NGC 2115, it must be identified as NGC 2115A or PGC 18001. The other galaxy in the pair is identified in this database as NGC 2115B, which is PGC 18002.

Supernova

One supernova has been observed in NGC 2115:SN 2021clw was discovered by ASAS-SN on 10 February 2021.