• Source: HD 192263 b

      • HD 192263 b, also named Beirut, is a gas giant planet with a mass about three quarters that of Jupiter mass. It orbits the star in a circular orbit completing one revolution in 24 days or so. It was discovered in 2000 by the Geneva Extrasolar Planet Search team. The planet was independently detected by the California and Carnegie Planet Search team.


      Naming


      The planet HD 192263 b is named Beirut. The name was selected in the NameExoWorlds campaign by Lebanon, during the 100th anniversary of the IAU. Beirut is the capital and largest city of Lebanon.


      Discovery


      In 2002 the existence of the planet was questioned by G. Henry: The star was observed to have photometric brightness variations that have same period and velocities as the planet. The signal could come from those variations instead of the planet orbiting the star or suggests that rotational modulation of the visibility of stellar surface activity is the source of the observed radial velocity variations. Finally, in 2003 the planet was confirmed; the planet is thought to be causing fluctuations in the system's magnetic field, causing visible activity.


      Characteristics


      Preliminary astrometry in 2001 set its inclination at 179.5°; but it is now thought to be inclined according to the star's ecliptic, edge-on to Earth.


      See also


      List of exoplanets discovered before 2000


      References


      Notes

      Bibliography
      Henry; Donahue, Robert A.; Baliunas, Sallie L. (2002). "A False Planet around HD 192263". The Astrophysical Journal Letters. 577 (2): L111–L114. Bibcode:2002ApJ...577L.111H. doi:10.1086/344291.


      External links


      "HD 192263". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2008-11-04.
      "A new extrasolar planet around the star HD 192263". university of Geneva website. – discovery announcement
      "The Controversial Planet Around HD 192263". exoplanets.org. Archived from the original on 2009-02-13.
      "Don't Take This Extrasolar Planet Off the List Just Yet Planet Around HD 192263". Space.com article. Archived from the original on 2002-09-11.
      "Observatory of Geneva and Laboratoire d'Astrophysique de l'EPFL". university of Geneva website. Archived from the original on 2010-01-20. Retrieved 2008-11-04.
      "Simulation HD 192263b". Observatory of Paris. Archived from the original on 2007-12-03.

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