NGC 7721
NGC 7721 imaged by Legacy Surveys
Observation data (J2000 epoch)
Constellation	Aquarius
Right ascension	23h 38m 48.65s[1]
Declination	−06° 31′ 04.30″[1]
Redshift	0.006728 ± 2.00e-6[1]
Distance	79 Mly (24.47 Mpc)[1]
Apparent magnitude (V)	11.6[1]
Characteristics
Type	SA(s)c[1]
Size	70,000 ly[1]
Apparent size (V)	3.5′ × 1.4′[1]
Other designations
PGC 72001,[1] AGC 630233,[1] IRAS 23362-0647,[1] LEDA 72001[1]

NGC 7721 is a spiral galaxy located around 79 million light-years away in the constellation Aquarius.^[1][2] NGC 7721 was discovered on September 10, 1785, by the astronomer William Herschel, and its diameter is 70,000 light-years across.^[1] NGC 7721 is not known to have much star formation, and it is not known to have an active galactic nucleus.^[1][3]

Supernova

One supernova has been observed in NGC 7721.

• 2007le (Type Ia, mag. 15.2) was discovered by Berto Monard [it] on 13 October 2007.^[4][5][6]

References

External links

• Media related to NGC 7721 at Wikimedia Commons