HD 213240 b
| Discovery | |
|---|---|
| Discovered by | Santos et al. |
| Discovery site | Geneva Extrasolar Planet Search |
| Discovery date | April 4, 2001 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| 1.92±0.026 AU | |
| Eccentricity | 0.4201+0.01 −0.0093 |
| 879±3 d 2.4071+0.008 −0.0083 yr | |
Average orbital speed | 23.7 |
| Inclination | 63°+17° −20° or 117°+20° −17° |
| 145°+21° −121° | |
| 2455901±12 | |
| 201.9°+1.4° −1.5° | |
| Semi-amplitude | 96.6 ± 2.0 |
| Star | HD 213240 |
| Physical characteristics | |
| Mass | 5.21+1.5 −0.49 MJ |
HD 213240 b is an exoplanet located 134 light-years (41 parsecs) from the Solar System in the constellation of Grus. It is a gas giant orbiting the G-type star HD 213240.
The planet was discovered in 2001 as part of the CORALIE extra-solar planet search program. It was described in a 2001 publication by astronomers N. C. Santos, M. Mayor, D. Naef, F. Pepe, D. Queloz, S. Udry and M. Burnet of Observatoire de Genève, Switzerland. Doppler spectroscopy was used. In 2023, the inclination and true mass of HD 213240 b were determined via astrometry.