HD 216770 b

HD 216770 b
Exoplanet List of exoplanets
Parent star
Star HD 216770
Constellation Piscis Austrinus
Right ascension (α) 22h 55m 53.7097s
Declination (δ) –26° 39 31.547
Distance123.5 ly
(37.89 pc)
Spectral type K1V
Orbital elements
Semi-major axis(a) 0.46 AU
Periastron (q) 0.29 AU
Apastron (Q) 0.63 AU
Eccentricity (e) 0.37 ± 0.06
Orbital period(P) 118.45 ± 0.55 d
(0.32429 y)
Orbital speed (υ) 42 km/s
Argument of
periastron
(ω) 281 ± 10°
Time of periastron (T0) 2,452,672 ± 3.5 JD
Semi-amplitude (K) 30.9 ± 1.9 m/s
Physical characteristics
Mass(m)>0.65 MJ
Discovery information
Discovery date June 30, 2003
Discoverer(s) Mayor et al.
Discovery method Doppler spectroscopy
Discovery site United States California, USA
Discovery status Published

HD 216770 b is an extrasolar planet orbiting the star HD 216770. It has a mass about two thirds that of Jupiter, largest planet in the Solar System. But unlike the gas giants in the Solar System, it orbits in a very eccentric orbit around the star. The mean distance from the star is slightly larger than Mercury's, and it completes one orbit around the star in every 118 days.[1]

See also

References

External links

Coordinates: 22h 55m 53.7097s, −26° 39′ 31.547″


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