HD 40307 g
Approximate size comparison of HD 40307 g with Earth. | |
| Discovery | |
|---|---|
| Discovered by | Mikko Tuomi et al. |
| Discovery site | La Silla Observatory, Chile |
| Discovery date | October 28, 2012 |
| radial velocity, using HARPS | |
| Orbital characteristics | |
| 0.600 AU (89,800,000 km) | |
| Eccentricity | 0.22 |
| 197.8 ± 9.0 d | |
| Semi-amplitude | 0.95 ± 0.3 |
| Star | HD 40307 |
| Physical characteristics | |
| 2.39 R🜨 | |
| Mass | 7.09 M🜨 |
| Temperature | 277.6 |
HD 40307 g is an exoplanet candidate suspected to be orbiting in the habitable zone of HD 40307. It is located 42 light-years away in the direction of the southern constellation Pictor. The planet was discovered by the radial velocity method, using the European Southern Observatory's HARPS apparatus by a team of astronomers led by Mikko Tuomi at the University of Hertfordshire and Guillem Anglada-Escude of the University of Göttingen, Germany.
The existence of the planet was disputed in 2015, as more Doppler spectroscopy data has become available.