HD 122430 b
HD 122430 b is a giant planet orbiting around the giant star HD 122430. It has a mass at least 3.71 times that of Jupiter. This planet located at a distance of 1.02 astronomical units away from its star, which is very similar to the Earth's distance from the Sun. Despite of this, the higher luminosity of the star implies it is heated much more strongly than the Earth is. Its orbit is highly eccentric, around 68%. At periastron, the orbital distance from its parent star is 0.33 AU. At apastron, the distance is 1.71 AU. If this planet were in the Solar System, its orbit would range from just within Mercury's orbit to just beyond Mars’s orbit.
| Discovery | |
|---|---|
| Discovered by | Setiawan et al. |
| Discovery site | Spain |
| Discovery date | April 14, 2003 |
| radial velocity | |
| Orbital characteristics | |
| Apastron | 1.71 AU (256,000,000 km) |
| Periastron | 0.33 AU (49,000,000 km) |
| 1.02 AU (153,000,000 km) | |
| Eccentricity | 0.68±0.09 |
| 344.95±1.08 d 0.94441 y | |
Average orbital speed | 32.3 |
| 2451986.71±3.75 | |
| 91.04±17.27 | |
| Semi-amplitude | 2.02 |
| Star | HD 122430 |
In Spain, Setiawan discovered this planet in 2003, using the radial velocity method.
See also
References
- Setiawan, J. (2003). "Planets around evolved stars". In Fridlund, M.; Henning, T. (eds.). Proceedings of the Conference on Towards Other Earths: DARWIN/TPF and the Search for Extrasolar Terrestrial Planets. ESA Publications Division. pp. 595–598. Bibcode:2003ESASP.539..595S. ISBN 92-9092-849-2.
External links
- "HD 122430". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2008-11-04.
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