HD 142022 Ab
Extrasolar planet in the constellation Octans
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]
| 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 |
See also
References
- ^ 1.0 1.1 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.
- ^ 2.0 2.1 2.2 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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