HD 128311 c
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 128311 | |
| Constellation | Boötes | |
| Right ascension | (α) | 14h 36m 00.5607s |
| Declination | (δ) | +09° 44′ 47.466″ |
| Distance | 54.14 ly (18.04 pc) | |
| Spectral type | K0V | |
| Mass | (m) | 0.8 M☉ |
| Radius | (r) | 0.73 R☉ |
| Temperature | (T) | 4965 K |
| Metallicity | [Fe/H] | 0.03 |
| Age | 0.39 Gyr | |
| Orbital elements | ||
| Semimajor axis | (a) | 1.76 ± 0.11 AU |
| Periastron | (q) | 1.46 AU |
| Apastron | (Q) | 2.06 AU |
| Eccentricity | (e) | 0.170 ± 0.090 |
| Orbital period | (P) | 928 ± 18 d (2.54 y) |
| Orbital speed | (υ) | 20.7 km/s |
| Argument of periastron |
(ω) | 200° ± 150° |
| Time of periastron | (T0) | 2,450,010 ± 400 JD |
| Semi-amplitude | (K) | 76.2 ± 4.6 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 3.22 ± 0.49 MJ (1020 ± 160 M⊕) |
| Discovery information | ||
| Discovery date | June 24, 2005 | |
| Discoverer(s) | Vogt et al. | |
| Discovery method | Doppler spectroscopy | |
| Discovery site |  California, USA | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
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]
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. Retrieved 2008-08-18.
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Coordinates: 
14h 36m 00.5607s, +09° 44′ 47.466″
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