NGC 7721 explained
| NGC 7721 |
| Epoch: | J2000 |
| Constellation Name: | Aquarius |
| Z: | 0.006728 ± 2.00e-6 |
| Dist Ly: | 79 Mly (24.47 Mpc) |
| Appmag V: | 11.6 |
| Type: | SA(s)c |
| Size: | 70,000 ly |
| Size V: | Unknown |
| Notes: | N/A |
| Names: | PGC 72001, AGC 630233, IRAS 23362-0647, LEDA 72001 |
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. NGC 7721 is not known to have much star formation, and it is not known to have an active galactic nucleus.[3] A supernova was observed in NGC 7721 in 2007, named 2007le.[4]
Notes and References
- Web site: By Name NASA/IPAC Extragalactic Database . 2024-04-13 . ned.ipac.caltech.edu.
- Web site: NGC 7721 - Spiral Galaxy in Aquarius TheSkyLive.com . 2024-04-13 . theskylive.com.
- Web site: New General Catalog Objects: NGC 7700 - 7749 . 2024-04-13 . cseligman.com.
- 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. 10.1093/mnras/stw3350. 14 April 2024. 1411.3332.
