NGC 821 is an elliptical galaxy in the constellation Aries. It is estimated to be about 80 million light-years from the Milky Way[3] and has a diameter of approximately 55,000 light years. NGC 821 was discovered on September 4, 1786, by astronomer Wilhelm Herschel.[4][5][6]
| NGC 821 | |
|---|---|
 Pan-STARRS image of NGC 821 | |
| Observation data (J2000 epoch) | |
| Constellation | Aries |
| Right ascension | 02h 08m 21.150s[1] |
| Declination | +10° 59′ 41.53″[1] |
| Redshift | 0.005814[2] |
| Heliocentric radial velocity | 1738 km/s[2] |
| Distance | 75.8 Mly (23.23 Mpc)[3] |
| Apparent magnitude (V) | 11.31[2] |
| Apparent magnitude (B) | 12.21[2] |
| Characteristics | |
| Type | E6[2] |
| Other designations | |
| UGC 1631, MCG +02-06-034, PGC 8160[2] | |
See also edit
References edit
- ^ a b Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331.
- ^ a b c d e f "NGC 821". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-05-24.
- ^ a b 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.
- ^ Ford, Dominic. "The galaxy NGC 821 - In-The-Sky.org". in-the-sky.org. Retrieved 2020-03-28.
- ^ "Revised NGC Data for NGC 821". spider.seds.org. Retrieved 2020-03-28.
- ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2020-03-28.
External links edit
Media related to NGC 821 at Wikimedia Commons
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