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NGC 721

From Wikipedia, the free encyclopedia
Galaxy in the constellation Andromeda
NGC 721
Pan-STARRS image of NGC 721
Observation data (J2000epoch)
ConstellationAndromeda
Right ascension01h 54m 45.45687s[1]
Declination+39° 23′ 00.7702″[1]
Redshift0.018566[2]
Heliocentric radial velocity5514 km/s[2]
Distance182.6 Mly (55.98 Mpc)[3]
Apparent magnitude (B)13.8[2]
Characteristics
TypeSB(rs)bc[4]
Other designations
UGC 1376,MCG 06-05-043,PGC 7097[2]

NGC 721 is abarred spiral galaxy located in theconstellation Andromeda about 250 millionlight years from theMilky Way. It was discovered by the PrussianastronomerHeinrich d'Arrest in 1862.[5][6][7]

See also

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References

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  1. ^abBrown, A. G. A.; et al. (Gaia collaboration) (August 2018)."Gaia Data Release 2: Summary of the contents and survey properties".Astronomy & Astrophysics.616. A1.arXiv:1804.09365.Bibcode:2018A&A...616A...1G.doi:10.1051/0004-6361/201833051.
  2. ^abcd"NGC 721".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved2020-05-20.
  3. ^Tully, R. Brent; Courtois, Hélène M.; Sorce, Jenny G. (2016)."Cosmicflows-3".The Astronomical Journal.152 (2): 21.arXiv:1605.01765.Bibcode:2016AJ....152...50T.doi:10.3847/0004-6256/152/2/50.S2CID 250737862. 50.
  4. ^"Results for object NGC 0721 (NGC 721)".NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved2020-05-24.
  5. ^Ford, Dominic."The galaxy NGC 721 - In-The-Sky.org".in-the-sky.org. Retrieved2020-04-09.
  6. ^"Revised NGC Data for NGC 721".spider.seds.org. Retrieved2020-04-09.
  7. ^"Your NED Search Results".ned.ipac.caltech.edu. Retrieved2020-04-09.


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