HD 122430

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 122430
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
CD-26° 10060, GC 18954, GCRV 8247, HIP 68581, HR 5265, SAO 182182
Database references
Extrasolar Planets

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]

The HD 122430 planetary system[2]
(in order from star)
Mass Semimajor axis
Orbital period
Eccentricity Inclination Radius
b >3.71 MJ 1.02 344.95 ± 1.08 0.68 ± 0.09

See also[edit]


  1. ^ da Silva, L.; et al. (November 2006), "Basic physical parameters of a selected sample of evolved stars", Astronomy and Astrophysics, 458 (2): 609–623, arXiv:astro-ph/0608160Freely accessible, Bibcode:2006A&A...458..609D, doi:10.1051/0004-6361:20065105 
  2. ^ Setiawan, J. (October 2003). Planets around evolved stars. Proceedings of the Conference on Towards Other Earths: DARWIN/TPF and the Search for Extrasolar Terrestrial Planets, 22-25 April 2003, Heidelberg, Germany. 539. Noordwijk, Netherlands: ESA Publications Division. pp. 595–598. Bibcode:2003ESASP.539..595S. ISBN 92-9092-849-2. 

Coordinates: Sky map 14h 02m 22.7815s, −27° 25′ 47.183″