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A0620-00 (V616 Monocerotis, V616 Mon) is a low-mass X-ray binary star and black-hole candidate in the constellation of Monoceros.[1][2]

Evidence from observation[edit]

One of the components of the A0620-00 binary system is known to be a dark, compact stellar object, with a mass between nine and thirteen times the mass of the Sun. The other component is observed to be a K-type star (approximately 0.5 solar masses).[3][4][5]


This binary system is located at a distance of approximately 3,000 light years, making the system the likely location of the nearest known black hole.[6]

See also[edit]


  1. ^ Gelino, Dawn M., et al. "A Multiwavelength, Multiepoch Study of the Soft X-Ray Transient Prototype, V616 Monocerotis (A0620-00)". The Astronomical Journal, Volume 122, Issue 5, pp. 2668-2678, November 2001.
  2. ^ Thomas E. Harrison, Steve B. Howell, Paula Szkody, France A. Cordova; "The Nature of the Secondary Star in the Black Hole X-Ray Transient V616 Mon (=A0620-00)"; The Astronomical Journal, Volume 133, Issue 1, pp. 162-168. January 2007; arXiv:astro-ph/0609535 ; Bibcode2007AJ....133..162H ; doi:10.1086/509572
  3. ^ University of Texas observatory Archived April 1, 2012, at the Wayback Machine. retrieved 19/09/2011
  4. ^ Abstract- T.R.Marsh,E.L.Robinson,J.H.Woods absabs.harvard retrieved 24/7/2010
  5. ^ T.R.Marsh,E.L.Robinson,J.H.Wood (1993) The Royal Astronomical Society (copyright) retrieved 19/09/2011
  6. ^ University of Texas observatory retrieved 21/03/2016

External links[edit]