| HD 213240 b | |
| Discoverer: | Santos et al. |
| Discovery Site: | Geneva Extrasolar Planet Search |
| Discovered: | April 4, 2001 |
| Apsis: | astron |
| Period: | |
| Inclination: | or |
| Avg Speed: | 23.7 |
| Semi-Amplitude: | 96.6 ± 2.0 |
HD 213240 b is an exoplanet located 134lk=onNaNlk=on from the Solar System in the constellation of Grus. It is a gas giant orbiting the G-type star HD 213240.[1]
The planet was discovered in 2001 as part of the CORALIE[2] 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.