HD 20868 b

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HD 20868 b
Exoplanet List of exoplanets
Parent star
Star HD 20868
Constellation Fornax
Right ascension (α) 03h 20m 42.69s[1]
Declination (δ) −33° 43′ 48.4″[1]
Apparent magnitude (mV) 9.92
Distance 151 ± 10[1] ly
(46 ± 3[1] pc)
Spectral type K3/4IV
Orbital elements
Semi-major axis (a) 0.947 ± 0.012 AU
(142 ± 1.8 Gm)
Periastron (q) 0.237 AU
(35.5 Gm)
Apastron (Q) 1.66 AU
(248 Gm)
Eccentricity (e) 0.75 ± 0.002
Orbital period (P) 380.85 ± 0.09 d
(1.0427 ± 0.0002 y)
Orbital speed (υ) 27.1 km/s
Argument of
periastron
(ω) 356.2 ± 0.4°
Time of periastron (T0) 2,454,451.52 ± 0.1 JD
Physical characteristics
Minimum mass (m sin i) 1.99 ± 0.05 MJ
(632 ± 16 M)
Discovery information
Discovery date October 26, 2008
Discoverer(s) Moutou et al.[2]
Discovery method Doppler spectroscopy
(HARPS)
Discovery site La Silla Observatory
Discovery status Published[2]
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBAD data
Exoplanet Archive data
Open Exoplanet Catalogue data

HD 20868 b is an extrasolar planet located approximately 159 light-years away in the constellation of Fornax, orbiting the 10th magnitude K-type subgiant star HD 20868. This planet has a minimum mass of 1.99 times more than Jupiter and orbits at a distance of 0.947 AU. This planet takes 380.85 days or 12.5 months to revolve around the star with an eccentricity of 0.75, one of the most eccentric of any known extrasolar planets. At periastron, the distance is 0.237 AU and at apastron, the distance is 1.66 AU.

This planet was discovered on October 26, 2008 by Moutou et al. using the HARPS spectrograph on ESO’s 3.6 meter telescope installed at La Silla Observatory in Atacama desert, Chile.[2]

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Coordinates: Sky map 03h 20m 42.6943s, −33° 43′ 48.374″