UGC 4457

UGC 4457 known as PGC 23935, is a barred spiral galaxy, containing an active galactic nucleus in the Cancer constellation.^[1][2][3] It is located 500 million light-years away from the Solar System^[3] and has a diameter of 290,000 light-years,^[1] making it slightly more massive compared to the Milky Way.^[4] The galaxy is moving away at a speed of 11,162 kilometers per second.^[1]

UGC 4457
Hubble Space Telescope image of UGC 4457
Observation data (J2000 epoch)
Constellation	Cancer
Right ascension	08h 31m 57.6s
Declination	+19° 12′ 41.4″
Redshift	0.037179
Heliocentric radial velocity	11,162 km/s
Distance	500 Mly (153.3 Mpc)
Characteristics
Type	SAB(rs)pec
Size	290,000 ly
Apparent size (V)	0.96' x 0.50'
Notable features	Interacting galaxy
Other designations
UGC 4457 PGC 23935, Arp 58, IRAS 08290+1922, MCG +03-22-017, VV 413, LEDA 23935, Z 89-40

UGC 4457 is interacting with the compact galaxy, PGC 23937. Together, they form Arp 58 and are classified under spiral galaxies that have small companions with high surface brightness.^[5] In addition, this interacting galaxy pair is also an M51 type system.^[6]

UGC 4457 shows disturbed spiral arms, indicating signs of velocity disturbance levels and regions of scattered ionized gas, typically normal for interacting galaxies. A faint spiral bridge can be seen thus representing the remains of an older mode of spiral waves.^[7]