 HD 69830 c | |
| Discovery | |
|---|---|
| Discovered by | C. Lovis et al. |
| Discovery date | May 18, 2006 |
| Detection method | Radial velocity |
| Orbital characteristics | |
| Semi-major axis | 0.181 ± 0.004 AU (27,080,000 ± 600,000 km) |
| Eccentricity | 0.03±0.027 |
| Orbital period (sidereal) | 31.6158±0.0051 d |
| Time of periastron | 2,453,469.6 ± 2.8 |
| Argument of periastron | 221 ± 35 |
| Semi-amplitude | 2.6±0.1 m/s |
| Star | HD 69830 |
| Physical characteristics | |
| Mass | ≥12.09+0.55 −0.54 M🜨 |
| Temperature | ~522 K |
HD 69830 c is an exoplanet orbiting HD 69830. It is the second-closest planet in its system and has a minimum mass 12 times that of Earth. Based on theoretical modeling in the 2006 discovery paper, it is likely to be a rocky planet, not a gas giant. However, other work has found that if it had formed as a gas giant, it would have stayed that way, and it is now understood that planets this massive are rarely rocky.
References
- ^ Lovis, Christophe; et al. (2006). "An extrasolar planetary system with three Neptune-mass planets" (PDF). Nature. 441 (7091): 305–309. arXiv:astro-ph/0703024. Bibcode:2006Natur.441..305L. doi:10.1038/nature04828. PMID 16710412. S2CID 4343578. Archived from the original (PDF) on 2016-03-03. Retrieved 2013-11-22.
- ^ Laliotis, Katherine; Burt, Jennifer A.; et al. (February 2023). "Doppler Constraints on Planetary Companions to Nearby Sun-like Stars: An Archival Radial Velocity Survey of Southern Targets for Proposed NASA Direct Imaging Missions". The Astronomical Journal. 165 (4): 176. arXiv:2302.10310. Bibcode:2023AJ....165..176L. doi:10.3847/1538-3881/acc067.
- H. Lammer; et al. (2007). "The impact of nonthermal loss processes on planet masses from Neptunes to Jupiters" (PDF). Geophysical Research Abstracts. 9 (7850).
- Chen, Jingjing; Kipping, David (2017). "Probabilistic Forecasting of the Masses and Radii of Other Worlds". The Astrophysical Journal. 834 (1): 17. arXiv:1603.08614. Bibcode:2017ApJ...834...17C. doi:10.3847/1538-4357/834/1/17. S2CID 119114880.
| The HD 69830 system | |
|---|---|
| Stars | |
| Planets | |
| Misc. | |
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