HD 122430
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| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Hydra |
| Right ascension | 14h 02m 22.7815s |
| Declination | −27° 25′ 47.183″ |
| Apparent magnitude (V) | 5.48 |
| Distance | 440 ly (135 pc) |
| Spectral type | K3III |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia |
data |
HD 122430 is an orange giant star about 440 light years away in the constellation of Hydra on the celestial sphere. The star has completely run out of the hydrogen fuel that keeps it stable, although its age is only 3.1 billion years old, younger than the Sun’s 4.6 billion years. HD 122430 has a mass of 1.4 times and radius of 22.9 times that of the Sun. Despite its younger age, it has slightly lower metallicity, approximately 90%. The temperature of its surface (photosphere) is approximately 4300 kelvins.[1]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | >3.71 MJ | 1.02 | 344.95 ± 1.08 | 0.68 ± 0.09 |
[edit] See also
[edit] References
- ^ da Silva, L. et al. (November 2006), "Basic physical parameters of a selected sample of evolved stars", Astronomy and Astrophysics 458 (2): 609–623, Bibcode 2006A&A...458..609D, doi:10.1051/0004-6361:20065105
- Setiawan, J. (2003). "Planets around evolved stars". ARI 539: 595–598. Bibcode 2003ESASP.539..595S.
Coordinates: 
14h 02m 22.7815s, +27° 25′ 47.183″
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