HD 122430 b

HD 122430 b
Exoplanet List of exoplanets
Parent star
Star HD 122430
Constellation Hydra
Right ascension (α) 14h 02m 22.7815s
Declination (δ) −27° 25′ 47.183″
Distance440 ly
(135 pc)
Spectral type K3III
Orbital elements
Semi-major axis(a) 1.02 AU
(153 Gm)
Periastron (q) 0.33 AU
(49 Gm)
Apastron (Q) 1.71 AU
Eccentricity (e) 0.68±0.09
Orbital period(P) 344.95±1.08 d
(0.94441 y)
Orbital speed (υ) 32.3 km/s
Argument of
periastron		 (ω) 91.04±17.27°
Time of periastron (T0) 2451986.71±3.75 JD
Semi-amplitude (K) 2.02 m/s
Physical characteristics
Minimum mass(m sin i)3.71 MJ
(1180 M⊕)
Discovery information
Discovery date April 14, 2003
Discoverer(s) Setiawan et al.
Discovery method radial velocity
Discovery site Spain
Discovery status Published
Database references
Extrasolar Planets
Encyclopaedia		data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

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.

In Spain, Setiawan discovered this planet in 2003, using the radial velocity method.

See also

References

External links

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


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