NGC 7222

NGC 7222
Sloan Digital Sky Survey image of barred spiral galaxy NGC 7222
Observation data (J2000 epoch)
Constellation	Aquarius
Right ascension	22h 10m 51.760s
Declination	+02d 06m 20.87s
Redshift	0.041195
Heliocentric radial velocity	12,350 km/s
Distance	568 Mly (174.1 Mpc)
Apparent magnitude (V)	14.59
Surface brightness	14.20 mag/am
Characteristics
Size	281,000 ly
Apparent size (V)	1.2 x 1.2 arcmin
Other designations
PGC 68224, UGC 11934, CGCG 377-035, MCG +00-56-012, 2MASX J22105172+0206205, NSA 149629, SDSS J221051.74+020620.9, LEDA 68224

NGC 7222 is a large barred spiral galaxy with a ring structure,^[1] located in the constellation Aquarius.^[2] It is located 570 million light-years away from the Solar System^[3] and was discovered by German astronomer, Albert Marth on August 11, 1864.^[4]

NGC 7222 has a luminosity class of II and it has a broad H I line which contains regions of ionized hydrogen.^[3] NGC 7222 also has a surface brightness of 14.20 mag/am, which means it is considered a low surface brightness galaxy (LSB).^[5] LSBs are diffuse galaxies that have surface brightness one magnitude lower compared to the ambient night sky.

One supernova has been discovered in NGC 7222 so far: SN 2008dr.

SN 2008dr

SN 2008dr was discovered by a team of astronomers; J. Leja, D. Madison, W. Li, and A. V. Filippenko from University of California, Berkeley as part of Lick Observatory Supernova Search (LOSS).^[6] It had a magnitude of 16.8 and was located 1".3 west and 8".1 north of the nucleus.^[7][8] SN 2008dr was confirmed to be a Type Ia.^[9][10]

NGC 7222 has a companion which is a spiral galaxy, PGC 68229, also known as CGCG 377-036.^[11] The galaxy is located west of NGC 7222 at close proximity and is 579 million light-years distant.^[12] It is possible both galaxies together make up a galactic pair.^[4]