Astronomy:HD 142022 Ab
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Short description: Extrasolar planet in the constellation Octans
| 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 astronomical unit|AU | |
| Eccentricity | 0.506+0.071 −0.06 |
| Orbital period | 1935+30 −27 d 5.297+0.082 −0.073 yr |
| Average Orbital speed | 16.6 |
| Inclination | 71°±13° or 109°±13° |
| Longitude of ascending node | 141°±19° |
| astron|astron|helion}} | 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 Jupiter mass |
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]
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. doi:10.1051/0004-6361:20053720. Bibcode: 2006A&A...447.1159E. http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/abs/2006/09/aa3720-05/aa3720-05.html. Retrieved December 12, 2007.
- ↑ 2.0 2.1 2.2 Xiao, Guang-Yao et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics 23 (5): 055022. doi:10.1088/1674-4527/accb7e. Bibcode: 2023RAA....23e5022X.
External links
Coordinates: 
16h 10m 15.0238s, −84° 13′ 53.802″
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