HD 68988 c
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 68988 | |
| Constellation | Ursa Major | |
| Right ascension | (α) | 08h 18m 22.1731s |
| Declination | (δ) | +61° 27′ 38.599″ |
| Distance | 192 ly (58.8 pc) | |
| Spectral type | G0 | |
| Orbital elements | ||
| Semi-major axis | (a) | 5.32 AU |
| Periastron | (q) | 5.27 AU |
| Apastron | (Q) | 5.37 AU |
| Eccentricity | (e) | 0.01 ± 0.27 |
| Orbital period | (P) | 4100 ± 7300 d (11 y) |
| Orbital speed | (υ) | 14 km/s |
| Argument of periastron |
(ω) | 129° |
| Time of periastron | (T0) | 2452730 ± 510 JD |
| Semi-amplitude | (K) | 60 ± 11 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 5.29 MJ |
| Discovery information | ||
| Discovery date | November 2006 | |
| Discoverer(s) | Wright et al. | |
| Discovery method | Radial velocity | |
| Discovery site | California, US | |
| Discovery status | poorly constrained | |
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 would be 5.32 AU with an orbital period of 4100 ± 7300 days (11 years).[1][2]
See also
- HD 68988 b
- List of unconfirmed exoplanets
References
- ↑ 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. - ↑ 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.
External links
- "Notes for planet HD 68988 c". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-25.
- "HD 68988". Exoplanets. Retrieved 2008-08-25.
Coordinates: 
08h 18m 22.1731s, +61° 27′ 38.599″
This article is issued from Wikipedia - version of the 1/2/2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.