HD 192699 b

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HD 192699 b
Exoplanet List of exoplanets
Parent star
Star HD 192699
Constellation Aquila
Right ascension (α) 20h 16m 06.005s[1]
Declination (δ) +04° 34′ 50.85″[1]
Distance 214 ± 8[1] ly
(66 ± 2[1] pc)
Spectral type G8IV
Orbital elements
Semi-major axis (a) 1.16 AU
Periastron (q) 1.15 AU
Apastron (Q) 1.33 AU
Eccentricity (e) 0.149 ± 0.06
Orbital period (P) 351.5 ± 6 d
(0.9624 y)
Orbital speed (υ) 36.0 km/s
Argument of
(ω) 54 ± 30°
Time of periastron (T0) 2452994 ± 30 JD
Semi-amplitude (K) 48.1 ± 5 m/s
Physical characteristics
Mass (m) >2.5 MJ
(>790 M)
Discovery information
Discovery date April 10, 2007
Discoverer(s) Johnson et al.
Discovery method Doppler Spectroscopy
Discovery site Lick and Keck Observatory
Discovery status Published
Other designations
HIP 99894 b
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

HD 192699 b is an exoplanet located approximately 214 light-years away 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 (MJ). 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.[2]

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[edit]


  1. ^ a b c d van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ 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. arXiv:0704.2455Freely accessible. Bibcode:2007ApJ...665..785J. doi:10.1086/519677. 

External links[edit]

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