Epsilon Reticuli b, sometimes designated Epsilon Reticuli Ab to distinguish from the white dwarf companion of the primary star Epsilon Reticuli, also known as HD 27442, was discovered on December 16, 2000 by the Anglo-Australian Planet Search Team using the radial velocity method. The planet's mass is at least 56% greater than Jupiter mass, a more accurate estimate requiring its inclination to be known.
| Discovery | |
|---|---|
| Discovered by | Butler, Tinney, Marcy et al.[1] |
| Discovery site | Anglo-Australian Observatory |
| Discovery date | Dec 16, 2000 |
| Radial velocity | |
| Orbital characteristics | |
| 1.271 ± 0.073 AU (190,100,000 ± 10,900,000 km) | |
| Eccentricity | 0.060 ± 0.043 |
| 428.1 ± 1.1 d | |
| 2,451,963 ± 55 | |
| 216 | |
| Semi-amplitude | 32.2 ± 1.4 |
| Star | Epsilon Reticuli |
| Physical characteristics | |
| Mass | ≥1.56 ± 0.14 MJ |
The planet orbits its parent star relatively close, and with more than twice the eccentricity of Earth's orbit. Based on its mass, it is almost certainly a gas giant.[1][2]
References
edit- ^ a b Butler, R. P.; et al. (2001). "Two New Planets from the Anglo-Australian Planet Search". The Astrophysical Journal. 555 (1): 410–417. Bibcode:2001ApJ...555..410B. doi:10.1086/321467. hdl:2299/137. S2CID 122572834.
- ^ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. S2CID 119067572.
External links
edit- "HD 27442 B". SIMBAD. Centre de données astronomiques de Strasbourg.
- The Extrasolar Planets Encyclopaedia entry