Epsilon Eridani b
Epsilon Eridani b, also known as AEgir [sic], is an exoplanet approximately 10.5 light-years away orbiting the star Epsilon Eridani, in the constellation of Eridanus (the River). The planet was discovered in 2000, and as of 2023 remains the only confirmed planet in its planetary system. It orbits at around 3.5 AU with a period of around 7.6 years, and has a mass around 0.6 times that of Jupiter. As of 2023, both the Extrasolar Planets Encyclopaedia and the NASA Exoplanet Archive list the planet as 'confirmed'.
An artist's impression of Epsilon Eridani b, depicting it as a gas giant with rings. The object near the bottom is a hypothetical moon. | |
| Discovery | |
|---|---|
| Discovered by | Hatzes et al. |
| Discovery site | United States |
| Discovery date | 7 August 2000 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| 3.52±0.04 AU | |
| Eccentricity | 0.16±0.01 |
| 2,775 ± 5 days (7.598 ± 0.014 years) | |
| Inclination | 45°±8° |
| 302°±13° | |
| 2460963±26 | |
| 202°±4° | |
| Semi-amplitude | 10.4±0.1 m/s |
| Star | Epsilon Eridani |
| Physical characteristics | |
| Mass | 0.63+0.12 −0.04 MJ |
| Temperature | ~150 K (−123 °C; −190 °F) |
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