| 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 periastron |
(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. | |
| Detection method | radial velocity | |
| Discovery site | La Silla Observatory | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | 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.