HD 128311 c
HD 128311 c is an exoplanet located approximately 54 light-years away in the constellation of Boötes. This planet orbits in an eccentric orbit at 1.76 AU from its star (HD 128311). The planet has minimum mass 3.22 Jupiter masses.[1]
| Discovery | |
|---|---|
| Discovered by | Vogt et al. |
| Discovery site |  |
| Discovery date | June 24, 2005 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| Apastron | 2.06 AU (308,000,000 km) |
| Periastron | 1.46 AU (218,000,000 km) |
| 1.76 ± 0.11 AU (263,000,000 ± 16,000,000 km) | |
| Eccentricity | 0.170 ± 0.090 |
| 928 ± 18 d 2.54 y | |
Average orbital speed | 20.7 |
| 2,450,010 ± 400 | |
| 200° ± 150 | |
| Semi-amplitude | 76.2 ± 4.6 |
| Star | HD 128311 |
References
- Vogt, Steven S.; et al. (2005). "Five New Multicomponent Planetary Systems". The Astrophysical Journal. 632 (1): 638–658. Bibcode:2005ApJ...632..638V. doi:10.1086/432901.
External links
- "Notes for planet HD 128311 c". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-18.
- "HD 128311". Exoplanets. Archived from the original on 2008-05-14. Retrieved 2008-08-18.
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