HD 122430 b
| Discovery | |
|---|---|
| Discovered by | Setiawan et al. |
| Discovery site | Spain |
| Discovery date | April 14, 2003 |
| radial velocity | |
| Orbital characteristics | |
| Apastron | 1.71 AU (256 Gm) |
| Periastron | 0.33 AU (49 Gm) |
| 1.02 AU (153 Gm) | |
| 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 |
HD 122430 b is a proposed 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 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.
In Spain, Setiawan discovered this planet in 2003, using the radial velocity method.[1] However, a follow-up study by Soto et al. (2015) failed to detect a signal via the radial velocity method, so it remains unconfirmed.[2]
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.
- ^ Soto, M. G.; et al. (August 2015). "RAFT - I. Discovery of new planetary candidates and updated orbits from archival FEROS spectra". Monthly Notices of the Royal Astronomical Society. 451 (3): 3131–3144. arXiv:1505.04796. Bibcode:2015MNRAS.451.3131S. doi:10.1093/mnras/stv1144.
External links[]
- "HD 122430". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2008-11-04.
Coordinates: 
14h 02m 22.7815s, −27° 25′ 47.183″
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