HD 187123 c

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HD 187123 c
Exoplanet List of exoplanets
Parent star
Star HD 187123
Constellation Cygnus
Right ascension (α) 19h 46m 58.1130s
Declination (δ) +34° 25′ 10.288″
Distance 156.28 ly
(47.92 pc)
Spectral type G5V
Orbital elements
Semi-major axis (a) 4.80 AU
Periastron (q) 3.60 AU
Apastron (Q) 6.00 AU
Eccentricity (e) 0.249 ± 0.030
Orbital period (P) 3700 ± 530 d
(10 y)
Orbital speed (υ) 14 km/s
Argument of
(ω) 250 ± 170°
Time of periastron (T0) 2,459,910 ± 610 JD
Semi-amplitude (K) 25.1 ± 1.5 m/s
Physical characteristics
Minimum mass (m sin i) 1.95 MJ
Discovery information
Discovery date November 2006
Discoverer(s) Wright et al.
Discovery method radial velocity
Discovery site California, USA
Discovery status Published

HD 187123 c is an extrasolar planet located approximately 156 light-years away in the constellation of Cygnus, orbiting the star HD 187123. This planet was published in 2006. The radius of the planet's orbit is 4.80 AU, 113 times more distant from the star than first companion. This takes 10 years to orbit. As it is typical for very long-period planets, the orbit is eccentric, referring to as "eccentric Jupiter". At periastron, the orbital distance is 3.60 AU and at apastron, the distance is 6.00 AU. The planet's mass is nearly 2 times that of Jupiter, but is likely to be smaller in size than the inner planet.[1][2]

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Coordinates: Sky map 19h 46m 58.1130s, +34° 25′ 10.288″