NGC 5273

NGC 5273 is a lenticular galaxy located 16.6 e6pc away in the northern constellation of Canes Venatici. This galaxy was discovered by William Herschel on May 1, 1785. It is positioned $
 * 1) km/s$° to the southeast of the star 25 Canum Venaticorum.

The morphological classification of this galaxy is SA0(s), indicating it is lenticular in form. It displays a faint, unbarred spiral structure within a generally elliptical profile. NGC 5273 is classified as a type 1.5 Seyfert galaxy, with the X-ray emission from its active galactic nucleus undergoing significant absorption. However, data collected between the year 2000 and 2022 suggest this is a changing–look Seyfert, with the type ranging from 1 to 1.8/1.9. The activity level shows strong variability, allowing reverberation mapping of the supermassive black hole at the core. This object has an estimated mass of $0$.