NGC 5011 is an elliptical galaxy in the constellation of Centaurus.[2] It was discovered on 3 June 1834 by John Herschel.[4] It was described as "pretty bright, considerably small, round, among 4 stars" by John Louis Emil Dreyer, the compiler of the New General Catalogue.[4]

Optical companions

Several galaxies are not physically associated with NGC 5011, but appear close to NGC 5011 in the night sky. PGC 45847 is a spiral galaxy that is also known as NGC 5011A.[5] PGC 45918 is a lenticular galaxy[6] some 156 million light-years away from the Earth, in the Centaurus Cluster, and is designated NGC 5011B.[7] PGC 45917 is a dwarf galaxy, also designated NGC 5011C.[8][7] Although NGC 5011B and 5011C appear close together, they are no signs of them interacting.[7] NGC 5011C is actually much closer and is in the Centaurus A/M83 Group, at 13 million light years away.[7]

References

  1. ^ a b c 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. ^ a b c d e f "NED results for object NGC 5011". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 6 September 2017.
  3. ^ a b c "NGC 5011". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 6 September 2017.
  4. ^ a b "New General Catalog Objects: NGC 5000 - 5059". cseligman.com. Retrieved 6 September 2017.
  5. ^ "LEDA 45847". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 6 September 2017.
  6. ^ "LEDA 45848". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 6 September 2017.
  7. ^ a b c d "Don't trust your eyes | ESA/Hubble". www.spacetelescope.org. 2012. Retrieved 6 September 2017.
  8. ^ "LEDA 45917". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 6 September 2017.

Notes

  1. ^ a b 2MASS KS values used.
  • Media related to NGC 5011 at Wikimedia Commons


Allikas: https://en.wikipedia.org/wiki/NGC_5011
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