NGC 7721

Last updated
NGC 7721
NGC7721 - SDSS DR14.jpg
A Sloan Digital Sky Survey (SDSS) image of NGC 7721
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]
Size70,000 ly [1]
Apparent size  (V)Unknown
Notable featuresN/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]

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<span class="mw-page-title-main">NGC 4393</span> Galaxy in the constellation of Coma Berenices

NGC 4393 is a spiral galaxy about 46 million light-years away in the constellation Coma Berenices. It was discovered by astronomer William Herschel on April 11, 1785. It is a member of the NGC 4274 Group, which is part of the Coma I Group or Cloud.

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 "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. doi:10.1093/mnras/stw3350 . Retrieved 14 April 2024.
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