HD 69830 c
 HD 69830 c | |
| Discovery | |
|---|---|
| Discovered by | C. Lovis et al. |
| Discovery date | May 18, 2006 |
| Radial velocity | |
| Orbital characteristics | |
| 0.181 ± 0.004 AU (27,080,000 ± 600,000 km) | |
| Eccentricity | 0.03±0.027 |
| 31.6158±0.0051 d | |
| 2,453,469.6 ± 2.8 | |
| 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 candidate orbiting HD 69830. It was discovered in 2006 by the radial velocity method. 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.
HD 69830 c's existence was disputed in 2026 as the host star's radial velocity variations were found to be likely correlated with stellar activity indicators, instead of the planet's gravitational pull.
References
- 1 2 3 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.
- 1 2 3 4 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.
- 1 2 Boulkaboul, Amina; Sozzetti, Alessandro; Soubiran, Caroline; Damerdji, Yassine (2026-03-28). "Magnetic Activity Cycles and Rotation in Planet-hosting and Non-hosting Solar-type Stars". Research in Astronomy and Astrophysics. arXiv:2604.23694. doi:10.1088/1674-4527/ae587e. ISSN 1674-4527.
- ↑ H. Lammer; et al. (2007). "The impact of nonthermal loss processes on planet masses from Neptunes to Jupiters" (PDF). Geophysical Research Abstracts. 9 (7850). Archived from the original (PDF) on 2019-12-15. Retrieved 2008-08-13.
- ↑ 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.
 | This exoplanet related article is a stub. You can help Wikipedia by adding missing information. |