NGC 3923

NGC 3923
NGC 3923 by imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation	Hydra
Right ascension	11h 51m 01.7118s[1]
Declination	−28° 48′ 21.386″[1]
Redshift	0.005801±0.00003[1]
Heliocentric radial velocity	1739±9 km/s[1]
Distance	71 ± 23 Mly (21.6 ± 7.0 Mpc)[1]
Apparent magnitude (V)	9.6
Characteristics
Type	E4–5 [1]
Size	~264,700 ly (81.16 kpc) (estimated)[1]
Apparent size (V)	5.9′ × 3.9′[1]
Notable features	Shell galaxy
Other designations
ESO 440- G 017, AM 1148-283, MCG -05-28-012, PGC 37061[1]

NGC 3923 is an elliptical galaxy located in the constellation Hydra. It is located at a distance of about 90 million light years from Earth, which, given its apparent dimensions, means that NGC 3923 is about 155,000 light years across. NGC 3923 is an example of a shell galaxy where the stars in its halo are arranged in layers. It has more than twenty shells.^[2] It was discovered by William Herschel on March 7, 1791.