NGC 3021

NGC 3021 is a spiral galaxy in the northern constellation of Leo Minor. It is about 93 million light-years away from Earth, and is receding with a heliocentric radial velocity of. This galaxy was discovered by German-British astronomer William Herschel on December 7, 1785. The morphological classification of NGC 3021 is SAbc, which indicates a spiral galaxy with no central bar, an incomplete inner ring structure, and moderate to loosely wound spiral arms.
The galaxy contains many Cepheid variable stars. These stars have been used to measure the distances of galaxies. This galaxy was also used to help refine the measurement of the Hubble constant.

Supernovae

Two supernovae have been observed in NGC 3021:

SN 1995al was discovered by S. Pesci and P. Mazza in Milan, Italy, on November 1, 1995. G. M. Hurst in England confirmed the finding, estimating the magnitude at 13.2. The supernova was offset west and south of the galactic nucleus. The spectrum was found to be similar to SN 1981b near maximum.
SN 2023bvj was discovered by ATLAS on February 18, 2023.