82 G. Eridani d
| Discovery | |
|---|---|
| Discovered by | N. Nari et al. |
| Discovery date | August 22, 2023 (as a candidate) October 15, 2024 (confirmation announced) |
| Doppler spectroscopy (radial velocity method) | |
| Orbital characteristics | |
| Periastron | 0.75+0.15 −0.13 AU |
| Apoastron | 1.96+0.13 −0.16 AU |
| 1.3541±0.0068 AU | |
| Eccentricity | 0.45+0.11 −0.10 |
| 647.6+2.5 −2.7 days (1.77 years) | |
| 124–322 mas across orbit | |
| Star | 82 G. Eridani (HD 20794) |
| Physical characteristics | |
| ~1.7 R🜨 (rocky composition) ~2.1 R🜨 (volatile composition) | |
| Mass | ≥5.82±0.57 M🜨 |
82 G. Eridani d (HD 20794 d) is an exoplanet, possibly rocky, orbiting the solar-type star 82 G. Eridani. It is at least five times more massive than Earth and has an orbit partially within the habitable zone of its host star. Depending on its physical characteristics, which are poorly known, it could harbour life.
This planet is notable for its short distance from Earth, 19.7 ly (6.0 pc), which makes it one of the nearest exoplanets. It was discovered using doppler spectroscopy, after observations of periodic radial velocity variations of its host star. It had been suspected to exist since 2023, and was confirmed in 2024.