HD 108147 b

HD 108147 b
Exoplanet List of exoplanets
Parent star
Star HD 108147
Constellation Crux
Right ascension (α) 12h 25m 46.2686s
Declination (δ) –64° 01 19.516
Distance125.7 ly
(38.57 pc)
Spectral type F8/G0V
Orbital elements
Semi-major axis(a) 0.104 AU
Periastron (q) 0.052 AU
Apastron (Q) 0.156 AU
Eccentricity (e) 0.498 ± 0.025
Orbital period(P) 10.901 ± 0.001 d
(0.029845 y)
Orbital speed (υ) 104 km/s
Argument of
periastron
(ω) 318 ± 3.03°
Time of periastron (T0) 2,451,591.6 ± 0.1 JD
Semi-amplitude (K) 25.1 ± 6.1 m/s
Physical characteristics
Minimum mass(m sin i)0.40 MJ
(127 M)
Discovery information
Discovery date April 15, 2000[1]
Discoverer(s) Pepe, Mayor,
Galland et al.
Discovery method Doppler spectroscopy
(CORALIE)
Discovery site La Silla Observatory, Chile
Discovery status Published
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

HD 108147 b is a gas giant exoplanet with a minimum mass about half that of Jupiter. It orbits the star in a very tight "torch orbit". The distance between the planet and the star is only a tenth of the distance between Earth and the Sun (0.1AU). A number of such worlds are known to exist, but the eccentricity of this planet is unusually high. Planets orbiting very close to their parent stars usually have round orbits because of the tidal forces between the bodies.

See also

References

  1. "Exoplanets Galore!" (Press release). Garching, Germany: European Southern Observatory. April 15, 2000. Retrieved December 30, 2012.

External links

Coordinates: 12h 25m 46.2686s, −64° 01′ 19.516″


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