HD 187123 c

HD 187123 c Image

Description: 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.

Physical Properties

Mass (Jupiter mass): Unknown

Radius (Jupiter radius): 1.19 RJ

Density: 1.44 g/cm³

Equilibrium Temperature: Unknown

Orbital Parameters

Orbital Period: 3810.0 days

Semi-major Axis: 4.89 AU

Eccentricity: 0.252

Inclination: Unknown

Host Star Properties

Host Star: HD 187123

Spectral Type: G3 V

Temperature: 5790.0 K

Stellar Mass: 1.04 M

Stellar Radius: 1.15 R

Discovery Information

Planet Letter: c

Object ID: 3.11182

Host ID: 2.58681

Discovery Date: 2009-03

Discovery Year: 2008

Discovery Method: Radial Velocity

Discovery Locale: Ground

Discovery Facility: W. M. Keck Observatory

Discovery Instrument: HIRES Spectrometer

Back to List