HR 8799 e
Artistic rendering of HR 8799 e as a hot gas giant | |
| Discovery | |
|---|---|
| Discovered by | Marois et al. |
| Discovery site | Keck and Gemini observatories in Hawaii |
| Discovery date | November 1, 2010 (announced) November 22, 2010 (published) |
| Direct imaging | |
| Orbital characteristics | |
| ~ 14.5 ± 0.5 AU 16.4+2.1 −1.1 AU | |
| Eccentricity | 0.15 ± 0.08 |
| ~ 50 y | |
| Inclination | 25 ± 8° |
| Star | HR 8799 |
| Physical characteristics | |
| 1.17+0.13 −0.11 RJ | |
| Mass | 9.6+1.9 −1.8 MJ |
| 104.3 ± 0.3 cm s−2 | |
| Temperature | 1,000 K 1150 ± 50 K |
Spectral type | ~L7 |
HR 8799 e is a large exoplanet, orbiting the star HR 8799, which lies 129 light-years from Earth. This gas giant is between 5 and 10 times the mass of Jupiter. Due to their young age and high temperature all four discovered planets in the HR 8799 system are large, compared to all gas giants in the Solar System.