NGC 7250

NGC 7250 is an irregular galaxy located in the Lacerta constellation. It is a blue-colored galaxy with bright bursts of star formation: its star-forming rate is more than an order of magnitude greater than that of the Milky Way.^[5] It was discovered by German-British astronomer William Herschel on 8 November 1790.^[6]

NGC 7250
NGC 7250 imaged by the Hubble Space Telescope[1]
Observation data (J2000 epoch)
Constellation	Lacerta[1]
Right ascension	22h 18m 17.776s[2]
Declination	+40° 33′ 44.66″[2]
Redshift	0.0039[3]
Heliocentric radial velocity	1,168 km/s[3]
Distance	49.99 ± 14.37 Mly (15.328 ± 4.407 Mpc)[4]
Apparent magnitude (V)	12.58[3]
Apparent magnitude (B)	13.22[3]
Characteristics
Type	Irr
Mass	4.7×108[5] M☉
Size	~42,300 ly (12.97 kpc) (estimated)[4]
Apparent size (V)	1.7′ × 0.8′[4]
Other designations
PGC 68535, UGC 11980, MCG+07-45-024, Mrk 907, Z 530-22

The brighter star located in front of the galaxy is named TYC 3203-450-1, and is barely studied. It is about a million times closer to Earth than it the galaxy itself.^[7]

Supernova

One supernova has been observed in NGC 7250. SN 2013dy (Type Ia, mag. 17) was discovered by the Lick Observatory Supernova Search (LOSS) on 10 July 2013.^[8][9] It was detected about 2.4 hours after the explosion, making it the earliest-known detection of a supernova at the time.^[10]

See also

• List of NGC objects (7001–7840)