HD 142022 Ab
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 142022 A | |
| Constellation | Octans | |
| Right ascension | (α) | 16h 10m 15.0238s |
| Declination | (δ) | −84° 13′ 53.802″ |
| Distance | 117 ly (35.9 pc) | |
| Spectral type | G9V | |
| Orbital elements | ||
| Semi-major axis | (a) | 2.93 AU |
| Periastron | (q) | 1.38 AU |
| Apastron | (Q) | 4.48 AU |
| Eccentricity | (e) | 0.53 ± 0.20 |
| Orbital period | (P) | 1928 ± 46 d (5.278 y) |
| Orbital speed | (υ) | 16.6 km/s |
| Argument of periastron |
(ω) | 170 ± 9° |
| Time of periastron | (T0) | 2,450,971 ± 75 JD |
| Semi-amplitude | (K) | 92 ± 65 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 4.47 MJ (1420 M⊕) |
| Discovery information | ||
| Discovery date | 14 February 2005 | |
| Discoverer(s) | Eggenberger et al. | |
| Discovery method | Radial Velocity (CORALIE) | |
| Discovery site | La Silla Observatory | |
| Discovery status | Published | |
| Other designations | ||
| HIP 79242 b | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
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%.
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.
Coordinates: 
16h 10m 15.0238s, −84° 13′ 53.802″
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