NGC 2721


NGC 2721 is a barred spiral galaxy in the constellation of Hydra. Its velocity with respect to the cosmic microwave background is, which corresponds to a Hubble distance of. Additionally, 13 non-redshift measurements give a similar mean distance of. It was discovered by German-British astronomer William Herschel on 1 February 1786.
NGC 2721 is a Seyfert II galaxy, i.e. it has a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.

Supernova

One supernova has been observed in NGC 2721:SN 2024xjl was discovered by ATLAS on 5 October 2024.