Astronomy:NGC 7721

From HandWiki
Short description: Galaxy in the constellation Aquarius

Coordinates: Sky map 23h 38m 48.65s, −06° 31′ 04.30″

NGC 7721
A Sloan Digital Sky Survey (SDSS) image of NGC 7721
Observation data (J2000 epoch)
ConstellationAquarius
Right ascension 23h 38m 48.65s[1]
Declination−06° 31′ 04.30″[1]
Redshift0.006728 ± 2.00e-6[1]
Distance79 Mly (24.47 Mpc)[1]
Apparent magnitude (V)11.6[1]
Characteristics
TypeSA(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]

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 "By Name | NASA/IPAC Extragalactic Database". https://ned.ipac.caltech.edu/byname?objname=NGC+7721&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1. 
  2. ↑ "NGC 7721 - Spiral Galaxy in Aquarius | TheSkyLive.com". https://theskylive.com/sky/deepsky/ngc7721-object. 
  3. ↑ "New General Catalog Objects: NGC 7700 - 7749". https://cseligman.com/text/atlas/ngc77.htm#7721. 
  4. ↑ Johansson, J.; Goobar, A.; Kasliwal, M. M.; Helou, G.; Masci, F.; Tinyanont, S.; Jencson, J.; Cao, Y. et al. (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. https://academic.oup.com/mnras/article/466/3/3442/2869787. Retrieved 14 April 2024. 

Template:NGC objects:7500-7840



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:NGC_7721&oldid=3916379"