HD 117618 b

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HD 117618 b
Exoplanet List of exoplanets
Parent star
Star HD 117618
Constellation Centaurus
Right ascension (α) 13h 32m 25.56s
Declination (δ) –47° 16′ 16.91″
Distance 124.0 ly
(38.02 pc)
Spectral type G2V
Orbital elements
Semi-major axis (a) 0.176 ± 0.010 AU
Periastron (q) 0.102 AU
Apastron (Q) 0.250 AU
Eccentricity (e) 0.42 ± 0.17
Orbital period (P) 25.827 ± 0.019 d
(0.070709 y)
Orbital speed (υ) 74.4 km/s
Argument of
periastron
(ω) 254 ± 19°
Time of periastron (T0) 2,450,832.2 ± 1.8 JD
Semi-amplitude (K) 12.8 ± 2.2 m/s
Physical characteristics
Mass (m) >0.178 ± 0.021 MJ
(>56.5 M)
Discovery information
Discovery date 16 September 2004
Discoverer(s) C.G. Tinney, Butler,
Marcy et al.[1]
Discovery method Radial velocity
Discovery site Anglo-Australian Observatory
Discovery status Published[1]
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBAD data
Exoplanet Archive data
Open Exoplanet Catalogue data

HD 117618 b is an exoplanet discovered orbiting the star in September 2004. The planet is a small gas giant less than a fifth the mass of Jupiter. It orbits close to its star in a very eccentric orbit.[1][2]

References[edit]

  1. ^ a b c Tinney, C. G.; et al. (2005). "Three Low-Mass Planets from the Anglo-Australian Planet Search". The Astrophysical Journal. 623 (2): 1171–1179. Bibcode:2005ApJ...623.1171T. doi:10.1086/428661. 
  2. ^ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. Bibcode:2006ApJ...646..505B. arXiv:astro-ph/0607493Freely accessible. doi:10.1086/504701. 

External links[edit]

Coordinates: Sky map 13h 32m 25.56s, −47° 16′ 16.91″