Astronomy:HD 192263 b

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Short description: Gas giant extrasolar planet in the constellation Aquila
HD 192263 b / Beirut
Discovery
Discovered bySantos, Mayor,
Naef et al.[1]
Discovery siteLa Silla Observatory
Discovery dateSeptember 28th, 1999
Doppler Spectroscopy
(CORALIE)
Orbital characteristics
0.15 AU (22,000,000 km)
Eccentricity0
Orbital period24.348 ± 0.005 d
astron|astron|helion}}2,451,979.28 ± 0.08
0
Semi-amplitude51.9 ± 2.6
StarHD 192263


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.[1] The planet was independently detected by the California and Carnegie Planet Search team.[2][3]

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.[4][5]

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.[6] Finally, in 2003 the planet was confirmed; the planet is thought to be causing fluctuations in the system's magnetic field, causing visible activity.[7]

Characteristics

Preliminary astrometry in 2001 set its inclination at 179.5°;[8] but it is now thought to be inclined according to the star's ecliptic, edge-on to Earth.

See also

References

Notes
  1. ↑ 1.0 1.1 Santos, N. C. et al. (2000). "The CORALIE survey for Southern extra-solar planets III. A giant planet in orbit around HD 192263". Astronomy and Astrophysics 356: 599–602. Bibcode: 2000A&A...356..599S. http://aa.springer.de/papers/0356002/2300599/small.htm. Retrieved 2008-11-04. 
  2. ↑ "Astronomers discover six new planets orbiting nearby stars" (Press release). Kamuela, Hawaii: W. M. Keck Observatory. November 1, 1999. Retrieved December 19, 2017.
  3. ↑ Vogt, Steven S. et al. (2000). "Six New Planets from the Keck Precision Velocity Survey". The Astrophysical Journal 536 (2): 902–914. doi:10.1086/308981. Bibcode: 2000ApJ...536..902V. https://iopscience.iop.org/article/10.1086/308981/fulltext/. 
  4. ↑ "Approved names" (in en). http://www.nameexoworlds.iau.org/final-results. 
  5. ↑ "International Astronomical Union | IAU". https://www.iau.org/news/pressreleases/detail/iau1912/. 
  6. ↑ See, "No Planet at All: Star Fools Astronomers, Who See Spots". Space.com article. http://www.space.com/scienceastronomy/astronomy/planet_problem_020905.html. 
  7. ↑ Santos, N. C. et al. (2003). "The CORALIE survey for southern extra-solar planets XI. The return of the giant planet orbiting HD 192263". Astronomy and Astrophysics 406 (1): 373–381. doi:10.1051/0004-6361:20030776. Bibcode: 2003A&A...406..373S. http://www.aanda.org/articles/aa/full/2003/28/aah4460/aah4460.html. 
  8. ↑ Han; Black, David C.; Gatewood, George (2001). "Preliminary Astrometric Masses for Proposed Extrasolar Planetary Companions". The Astrophysical Journal Letters 548 (1): L57–L60. doi:10.1086/318927. Bibcode: 2001ApJ...548L..57H. 
Bibliography

External links

Coordinates: Sky map 20h 13m 59.8451s, −00° 52′ 00.757″




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