NGC 7721

NGC 7721
A Sloan Digital Sky Survey (SDSS) image of NGC 7721
Observation data (J2000 epoch)
Constellation	Aquarius
Right ascension	23^h 38^m 48.65^s[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)	Unknown
Notable features	N/A
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] A supernova was observed in NGC 7721 in 2007, named 2007le.^[4]

References

1. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-04-13.
2. "NGC 7721 - Spiral Galaxy in Aquarius | TheSkyLive.com". theskylive.com. Retrieved 2024-04-13.
3. "New General Catalog Objects: NGC 7700 - 7749". cseligman.com. Retrieved 2024-04-13.
4. Johansson, J.; Goobar, A.; Kasliwal, M. M.; Helou, G.; Masci, F.; Tinyanont, S.; Jencson, J.; Cao, Y.; Fox, O. D.; Kromer, M.; Amanullah, R.; Banerjee, D. P. K.; Joshi, V.; Jerkstrand, A.; Kankare, E.; Prince, T. A. (7 January 2017). "Spitzer observations of SN 2014J and properties of mid-IR emission in Type Ia supernovae". Monthly Notices of the Royal Astronomical Society. 466 (3): 3442–3449. arXiv:1411.3332. doi:10.1093/mnras/stw3350. Retrieved 14 April 2024.

External links

• Media related to NGC 7721 at Wikimedia Commons