HD 240210 b

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HD 240210 b
Extrasolar planet List of extrasolar planets
Parent star
Star HD 240210
Constellation Cassiopeia
Right ascension (α) 23h 10m 29.2303s
Declination (δ) +57° 01′ 46.035″
Distance 466 ± 173 ly
(143 ± 53 pc)
Spectral type K3III
Orbital elements
Semimajor axis (a) 1.33 AU
Periastron (q) 1.13 AU
Apastron (Q) 1.53 AU
Eccentricity (e) 0.15 ± 0.02
Orbital period (P) 501.75 ± 2.33 d
(1.3737 ± 0.0064 y)
Argument of
(ω) 277.49 ± 7.77°
Time of periastron (T0) 54486.73 ± 10.93 JD
Physical characteristics
Minimum mass (m sin i) 6.9 MJ
Discovery information
Discovery date June 10, 2009
Discoverer(s) Niedzielski et al.
Discovery method radial velocity
Discovery site La Silla Observatory
Discovery status Published
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

HD 240210 b is a 6.9 Jupiter-mass exoplanet discovered on June 10, 2009 by Niedzielski et al. using the Hobby-Eberly Telescope.[1] It orbits the K3 giant star HD 240210 in the constellation of Cassiopeia. Its average orbital separation is at 1.33 Astronomical Units away from its star with a year of 501.75 days.

See also[edit]