NGC 644

Last updated
NGC 644
NGC 644 DECam.jpg
DECam image of NGC 644
Observation data (J2000 epoch)
Constellation Phoenix
Right ascension 01h 38m 52.975s [1]
Declination −42° 35′ 07.19″ [1]
Redshift 0.020731 [2]
Heliocentric radial velocity 6151 km/s [2]
Distance 268.8  Mly (82.41  Mpc) [3]
Apparent magnitude  (B)14.79 [2]
Characteristics
Type SB(r)bc: [4]
Size126.8  kly (38.88  kpc) [4]
Other designations
MCG -07-04-027, PGC 6097 [2]

NGC 644 is a barred spiral galaxy in the constellation Phoenix in the southern sky. It is estimated to be 270 million light-years from the Milky Way and has a diameter of approximately 130,000 light-years. [4] Together with NGC 641, it probably forms a gravitationally bound pair of galaxies. The object was discovered on September 5, 1834 by John Herschel. [5] [6]

Contents

Two supernovae have been observed in NGC 644: SN 2011gm (type Ia, mag. 15.8), [7] and SN 2018cmj (type II, mag. 17.1). [8]

See also

References

  1. 1 2 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.
  2. 1 2 3 4 "NGC 644". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-05-20.
  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. 1 2 3 "Results for object NGC 0644 (NGC 644)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2020-05-20.
  5. ↑ Ford, Dominic. "The galaxy NGC 644 - In-The-Sky.org". in-the-sky.org. Retrieved 2020-04-03.
  6. ↑ "Revised NGC Data for NGC 644". spider.seds.org. Retrieved 2020-04-03.
  7. ↑ Transient Name Server entry for SN 2011gm. Retrieved 24 March 2023.
  8. ↑ Transient Name Server entry for SN 2018cmj. Retrieved 24 March 2023.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.