| Discovery | |
|---|---|
| Discovered by | Johnson et al. |
| Discovery site | Lick Observatory and Keck Observatory |
| Discovery date | 2007 |
| Detection method | Doppler spectroscopy |
| Orbital characteristics | |
| Semi-major axis | 1.148±0.057 AU |
| Eccentricity | 0.028±0.034 |
| Orbital period (sidereal) | 354.10±0.70 d |
| Time of perihelion | 2454042±64 JD |
| Argument of perihelion | 189±66 º |
| Semi-amplitude | 37.8±2.0 m/s |
| Star | HD 210702 |
| Physical characteristics | |
| Mass | ≥1.808±0.097 MJ |
HD 210702 b is an exoplanet located approximately 177 light-years away in the constellation of Pegasus, orbiting the star HD 210702. This planet, together with HD 175541 b and HD 192699 b, are planets around intermediate mass stars that were announced in April 2007 by Johnson et al. It has at least twice the mass of Jupiter and it orbits with semimajor axis of 1.17 AU, corresponding to a period of 341.1 days.
Planets around intermediate mass subgiants provide clues for the history of formation and migration of planets around A-type stars.
See also
References
- ^ Johnson, John Asher; et al. (2007). "Retired A Stars and Their Companions: Exoplanets Orbiting Three Intermediate-Mass Subgiants". The Astrophysical Journal. 665 (1): 785–793. arXiv:0704.2455. Bibcode:2007ApJ...665..785J. doi:10.1086/519677.
- ^ Luhn, Jacob K.; et al. (2019). "Retired A Stars and Their Companions. VIII. 15 New Planetary Signals around Subgiants and Transit Parameters for California Planet Search Planets with Subgiant Hosts". The Astronomical Journal. 157 (4). 149. arXiv:1811.03043. Bibcode:2019AJ....157..149L. doi:10.3847/1538-3881/aaf5d0. S2CID 102486961.
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- "HR 8461". webviz.u-strasbg.fr/.
External links
- "HD 210702". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2008-10-25.