HD 69830 b
Coordinates: 
08h 18m 23.9s, −12° 37′ 55.8″
08h 18m 23.9s, −12° 37′ 55.8″C. Lovis et al.[1] | |
| Discovery date | May 18, 2006 |
|---|---|
| Radial velocity | |
| Orbital characteristics | |
| 0.0764 ± 0.0017 AU (11,430,000 ± 250,000 km)[2] | |
| Eccentricity | 0.128±0.028[2] |
| 8.66897±0.00028 d[2] | |
| 2,453,496.8 ± 0.06 | |
| 340 ± 26 | |
| Semi-amplitude | 3.4±0.1 m/s[2] |
| Star | HD 69830 |
| Physical characteristics | |
| Mass | ≥10.1+0.38 −0.37 M🜨[2] |
| Temperature | ~804 K |
HD 69830 b is a Neptune-mass or super-Earth-mass exoplanet orbiting the star HD 69830. It is at least 10 times more massive than Earth. It also orbits very close to its parent star and takes 82/3 days to complete an orbit.
Based on theoretical modeling in the 2006 discovery paper, this is likely to be a
rocky planet, not a gas giant.[1] However, other work has found that if it had formed as a gas giant, it would have stayed that way,[3] and it is now understood that planets this massive are rarely rocky.[4]
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.[5]
References
- ^ S2CID 4343578. Archived from the original(PDF) on 2016-03-03. Retrieved 2013-11-22.
- ^ .
- ^ H. Lammer; et al. (2007). "The impact of nonthermal loss processes on planet masses from Neptunes to Jupiters" (PDF). Geophysical Research Abstracts. 9 (7850).
- S2CID 119114880.
- S2CID 42315630.
 | This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it. |