HD 69830 b
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| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 69830 | |
| Constellation | Puppis | |
| Right ascension | (α) | 08h 18m 23.9s |
| Declination | (δ) | -12° 37′ 55.8″ |
| Distance | 41 ly (12.6 pc) | |
| Spectral type | K0V | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.0785 AU |
| Eccentricity | (e) | 0.1±0.04 |
| Orbital period | (P) | 8.667±0.003 d |
| Angular distance | (θ) | 6.23 mas |
| Longitude of periastron |
(ω) | 340±26° |
| Time of periastron | (T0) | 2,453,496.8±0.06 JD |
| Semi-amplitude | (K) | 3.51±0.15 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.033 MJ |
| Temperature | (T) | ~804 K |
| Discovery information | ||
| Discovery date | May 18, 2006 | |
| Discoverer(s) | Lovis et al. | |
| Detection method | Radial velocity | |
| Discovery status | Published | |
HD 69830 b is a Neptune-mass or Super-Earth mass extrasolar planet orbiting the star HD 69830. This planet is 10 times more massive than Earth, making it the least massive in the system. It also orbits quite close to its parent star and takes 82/3 days to complete an orbit. This planet would likely be a gas giant in spite of its low mass.
If HD 69830 b is a terrestrial planet, models predict that tidal heating would produce a heat flux at the surface of about 55 W/m2. This is 20 times that of Io.[1]
[edit] References
- Lovis et al. (2006). "An extrasolar planetary system with three Neptune-mass planets". Nature 441: 305–309. doi:.
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