NGC 4496

NGC4496 is a pair of galaxies in the constellation of Virgo. Individually, the larger, northern galaxy is designated NGC 4496A, and the smaller, southern galaxy as NGC 4496B. They were discovered by German-British astronomer William Herschel on 23 February 1784. Herschel described his observation as a double-nucleus galaxy or as two nebulae. Herschel observed them again on 11 March 1784, not realizing he had already seen them. This resulted in two New General Catalogue entries for this galaxy group: NGC 4496 and NGC 4505.
The velocity with respect to the cosmic microwave background for NGC 4496A is, which corresponds to a Hubble distance of. However, 47 non-redshift measurements give a much closer distance of.
The velocity with respect to the cosmic microwave background for NGC 4496B is, which corresponds to a Hubble distance of.
NGC 4496A along with NGC 4496B are listed together as Holm415 in Erik Holmberg's A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems, published in 1937. They are also listed as VV 76 in the Vorontsov-Vel'yaminov Interacting Galaxies catalogue. This grouping is purely optical, as NGC 4496B is much more distant than NGC 4496A.

Morphology

Eskridge, Frogel, and Pogge published a paper in 2002 describing the morphology of 205 closely spaced spiral or lenticular galaxies. The observations were made in the H-band of the infrared and in the B-band. Eskridge and colleagues described NGC 4136 as follows:

Supernovae

Three supernovae have been observed in NGC 4496:

SN1960F was discovered by Milton Hummason on 17 April 1960.
SN1988M was discovered by Alex Filippenko and Wallace L. W. Sargent on 7 April 1988.
SN2025nqb was discovered by Supernovae and Gravitational Lenses Follow up on 16 June 2025. It was initially classified as Type Ic, but later analysis concluded it to be Type Ib.