HD 142022 Ab
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Extrasolar planet in the constellation Octans
DiscoveredbyEggenberger et al.
Discoverydate14 February 2005
| Discovery[1] | |
|---|---|
| Discovered by | Eggenberger et al. |
| Discovery site | La Silla Observatory |
| Discovery date | 14 February 2005 |
| Radial Velocity (CORALIE) | |
| Orbital characteristics[2] | |
| 2.939±0.062 AU | |
| Eccentricity | 0.506+0.071 −0.06 |
| 1935+30 −27 d 5.297+0.082 −0.073 yr | |
Average orbital speed | 16.6 |
| Inclination | 71°±13° or 109°±13° |
| 141°±19° | |
| 2456730+50 −44 | |
| 168.5°+4.1° −5.0° | |
| Semi-amplitude | 92 ± 65 |
| Star | HD 142022 A |
| Physical characteristics[2] | |
| Mass | 4.51+0.91 −0.61 MJ |
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, with a minimum mass 4.5 times Jupiter. It has a relatively wide separation between the planet and the star of nearly 3 AU, and takes 1928 days or 5.28 years to revolve. As is common for long-period planets, it has a relatively high eccentricity of 53±20%.[1] In 2023, the inclination and true mass of HD 142022 Ab were determined via astrometry.[2]
References
- 1 2 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. S2CID 18200070. Retrieved December 12, 2007.
- 1 2 3 Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics. 23 (5): 055022. arXiv:2303.12409. Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e.
External links
- "HD 142022 A". Exoplanets. Archived from the original on 2012-03-04. Retrieved 2008-11-01.
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