Astronomy:NGC 721
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Short description: Galaxy in the constellation Andromeda
| NGC 721 | |
|---|---|
 Pan-STARRS image of NGC 721 | |
| Observation data (J2000 epoch) | |
| Constellation | Andromeda |
| Right ascension | 01h 54m 45.45687s[1] |
| Declination | +39° 23′ 00.7702″[1] |
| Redshift | 0.018566[2] |
| Helio radial velocity | 5514 km/s[2] |
| Distance | 182.6 Mly (55.98 Mpc)[3] |
| Apparent magnitude (B) | 13.8[2] |
| Characteristics | |
| Type | SB(rs)bc[4] |
| Other designations | |
| UGC 1376, MCG06-05-043, PGC 7097[2] | |
NGC 721 is a barred spiral galaxy located in the constellation Andromeda about 250 million light years from the Milky Way. It was discovered by the Prussian astronomer Heinrich d'Arrest in 1862.[5][6][7]
See also
References
- ↑ 1.0 1.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.
- ↑ 2.0 2.1 2.2 2.3 "NGC 721". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+721.
- ↑ Tully, R. Brent; Courtois, Hélène M.; Sorce, Jenny G. (2016). "Cosmicflows-3". The Astronomical Journal 152 (2): 21. doi:10.3847/0004-6256/152/2/50. 50. Bibcode: 2016AJ....152...50T.
- ↑ "Results for object NGC 0721 (NGC 721)". NASA/IPAC Extragalactic Database. California Institute of Technology. https://ned.ipac.caltech.edu/byname?objname=NGC%20721&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1.
- ↑ Ford, Dominic. "The galaxy NGC 721 - In-The-Sky.org" (in en). https://in-the-sky.org/data/object.php?id=NGC721.
- ↑ "Revised NGC Data for NGC 721". http://spider.seds.org/ngc/revngcic.cgi?NGC721.
- ↑ "Your NED Search Results". http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=ngc+721&img_stamp=YES.
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