| Discovery | |
|---|---|
| Discovered by | Wright et al. |
| Discovery site | California, US |
| Discovery date | November 2006 |
| Detection method | Radial velocity |
| Orbital characteristics | |
| Semi-major axis | 13.2 AU (1.97×10 km) |
| Eccentricity | 0.45 −0.081 |
| Orbital period (sidereal) | 16100 −3500 d |
| Average orbital speed | 14 |
| Time of periastron | 2452730 ± 510 |
| Argument of periastron | 129 |
| Semi-amplitude | 60 ± 11 |
| Star | HD 68988 |
| Physical characteristics | |
| Mass | 15.0 −1.5MJ |
HD 68988 c is an exoplanet located approximately 192 light-years away in the constellation of Ursa Major, orbiting the star HD 68988. The parameters including period and eccentricity are highly uncertain. The semimajor axis was initially believed to be 5.32 AU with an orbital period of 4100 ± 7300 days (11 years). The planetary orbit was significantly refined in 2021.
See also
References
- ^ Rosenthal, Lee J.; Fulton, Benjamin J.; Hirsch, Lea A.; Isaacson, Howard T.; Howard, Andrew W.; Dedrick, Cayla M.; Sherstyuk, Ilya A.; Blunt, Sarah C.; Petigura, Erik A.; Knutson, Heather A.; Behmard, Aida; Chontos, Ashley; Crepp, Justin R.; Crossfield, Ian J. M.; Dalba, Paul A.; Fischer, Debra A.; Henry, Gregory W.; Kane, Stephen R.; Kosiarek, Molly; Marcy, Geoffrey W.; Rubenzahl, Ryan A.; Weiss, Lauren M.; Wright, Jason T. (2021), "The California Legacy Survey. I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades", The Astrophysical Journal Supplement Series, 255 (1): 8, arXiv:2105.11583, Bibcode:2021ApJS..255....8R, doi:10.3847/1538-4365/abe23c, S2CID 235186973
- Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. hdl:2299/1103. S2CID 119067572. Archived from the original on 2019-12-07. Retrieved 2009-03-11.
- Wright, J. T.; et al. (2007). "Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars". The Astrophysical Journal. 657 (1): 533–545. arXiv:astro-ph/0611658. Bibcode:2007ApJ...657..533W. doi:10.1086/510553. S2CID 35682784.
External links
- "Notes for planet HD 68988 c". Extrasolar Planets Encyclopaedia. Retrieved 2008-08-25.
- "HD 68988". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2008-08-25.
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