Astronomy:HD 192699 b

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Short description: Extrasolar planet in the constellation Aquila
HD 192699 b / Khomsa
Discovery[1]
Discovered byJohnson et al.
Discovery siteLick Observatory and Keck Observatory
Discovery date2007
Doppler spectroscopy
Orbital characteristics[2]
1.063±0.049 astronomical unit|AU
Eccentricity0.082±0.041
Orbital period340.94±0.92 d
|{{{apsis}}}|helion}}2454079±36 JD
87±37 º
Semi-amplitude49.3±2.1 m/s
StarHD 192699
Physical characteristics[2]
Mass≥2.096±0.093 MJ



HD 192699 b, also named Khomsa, is an exoplanet located approximately 214 light-years away[3] in the constellation of Aquila, orbiting the star HD 192699. This planet was discovered in April 2007, massing at least 2.5 times the mass of Jupiter (|♃|J}}}}}}). Despite its orbital distance more than that of Earth, the orbital period is less than a year, because the parent star is more massive than the Sun.[1]

The planet HD 192699 b is named Khomsa. The name was selected in the NameExoWorlds campaign by Tunisia, during the 100th anniversary of the IAU. Khomsa is a palm-shaped amulet that is popular in Tunisia.[4][5]

The existence of this planet around a 1.68 solar mass (M☉) star provides evidence for the existence of planetary systems around A-type main sequence stars.

See also

References

  1. ↑ 1.0 1.1 Johnson, John Asher et al. (2007). "Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants". The Astrophysical Journal 665 (1): 785–793. doi:10.1086/519677. Bibcode: 2007ApJ...665..785J. 
  2. ↑ 2.0 2.1 Luhn, Jacob K. et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal 157 (4): 149. doi:10.3847/1538-3881/aaf5d0. Bibcode: 2019AJ....157..149L. 
  3. ↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  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/. 

Coordinates: Sky map 20h 16m 06.0043s, +04° 34′ 50.863″




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