| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
(Artist's impression) |
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| Parent star | ||
| Star | HD 69830 | |
| Constellation | Puppis | |
| Right ascension | (α) | 08h 18m 23.9s |
| Declination | (δ) | -12° 37′ 55.8″ |
| Apparent magnitude | (mV) | 5.95 |
| Distance | 41 ly (12.6 pc) |
|
| Spectral type | K0V | |
| Mass | (m) | 0.86 ± 0.03 M☉ |
| Radius | (r) | 0.89 R☉ |
| Temperature | (T) | 5385 ± 20 K |
| Metallicity | [Fe/H] | −0.05 ± 0.02 |
| Age | 5.1–6.1 Gyr | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.0785 AU |
| Eccentricity | (e) | 0.1±0.04 |
| Orbital period | (P) | 8.667±0.003 d |
| Argument 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 | ||
| Minimum mass | (m sin i) | 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 | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
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 is likely to be a rocky planet, not a gas giant.[1] If it had formed as a gas giant, it would have stayed that way.[2]
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.[3]
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Coordinates: 08h 18m 23.9s, −12° 37′ 55.8″
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