NGC 2937

ConstellationHydra

Right ascension09^h 37^m 45^s

Declination+02° 44′ 50″

Distance~343 million ly

NGC 2937
NGC 2937 (bottom) and NGC 2936 (center)
Observation data (J2000 epoch)
Constellation	Hydra
Right ascension	09h 37m 45s
Declination	+02° 44′ 50″
Distance	~343 million ly
Apparent magnitude (V)	13.66
Apparent magnitude (B)	14.6
Surface brightness	22.84 mag/arcsec2
Characteristics
Type	E3
Other designations
ARP 142, PGC 27423, UGC 5131, MCG 1-25-6, CGCG 35-15, VV 316, NPM1G +02.0225

NGC 2937 is an elliptical galaxy located in the constellation Hydra. Its velocity relative to the cosmic microwave background is ~ 6,713 km/s, which corresponds to a Hubble distance of 105.1 ± 7.4 Mpc (~343 million ly).^[1] NGC 2937 was discovered by German astronomer Albert Marth in 1864.

NGC 2937 is in a strong gravitational interaction with its neighbor NGC 2936, a peculiar spiral galaxy . This interaction has given the latter an appearance that is far from that of a spiral galaxy. The shape of NGC 2936 has earned it the nickname of the "porpoise galaxy".^[2]

Together, these two galaxies appear in Halton Arp's Atlas of Peculiar Galaxies under the code Arp 142.^[3] Halton Arp uses them as an example from an elliptical galaxy.^[4] This pair of galaxies also appears in the Catalog of Collisional Ring Galaxies by Madore, Nelson and Petrillo.^[5]