HD 142022 Ab
HD 142022 Ab is an exoplanet discovered by the radial velocity method by Eggenberger et al. in 2005 after finding that HD 142022 A is wobbling which indicated the presence of a massive planet, designating as HD 142022 Ab, with mass of 4.5 times Jupiter. It has a relatively wide separation between a planet and a star with nearly 3 AU, which takes 1928 days or 5.28 years to revolve. As it is typical for long-period planets, it has a relatively high eccentricity of 53±20%.
| Discovery | |
|---|---|
| Discovered by | Eggenberger et al. |
| Discovery site | La Silla Observatory |
| Discovery date | 14 February 2005 |
| Radial Velocity (CORALIE) | |
| Orbital characteristics | |
| Apastron | 4.48 AU (670,000,000 km) |
| Periastron | 1.38 AU (206,000,000 km) |
Semi-major axis | 2.93 AU (438,000,000 km) |
| Eccentricity | 0.53 ± 0.20 |
| 1928 ± 46 d 5.278 y | |
Average orbital speed | 16.6 |
| 2,450,971 ± 75 | |
Argument of periastron | 170 ± 9 |
| Semi-amplitude | 92 ± 65 |
| Star | HD 142022 A |
See also
References
- Eggenberger; Mayor, M.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Udry, S.; Lovis, C. (2006). "The CORALIE survey for southern extrasolar planets XIV. HD 142022 b: a long-period planetary companion in a wide binary". Astronomy and Astrophysics. 447 (3): 1159–1163. arXiv:astro-ph/0510561. Bibcode:2006A&A...447.1159E. doi:10.1051/0004-6361:20053720. Retrieved December 12, 2007.
External links
- "HD 142022 A". Exoplanets. Archived from the original on 2012-03-04. Retrieved 2008-11-01.
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