HD 217107 c

HD 217107 c
Discovery
Discovered by	Vogt et al.
Discovery site	United States
Discovery date	June 24, 2005
Detection method	Doppler spectroscopy
Orbital characteristics
Semi-major axis	6.074±0.080 AU
Eccentricity	0.3848±0.0086
Orbital period (sidereal)	5189±21 d
Time of periastron	2450770±16
Argument of periastron	206.3±1.7
Semi-amplitude	53.41±0.75
Star	HD 217107

HD 217107 c is an extrasolar planet^[2] approximately 64 light-years away from Earth in the constellation of Pisces (the Fish). The planet was the second planet to be discovered orbiting the star HD 217107. HD 217107 c's existence was hypothesized in 1998 due to the eccentricity of the inner planet's orbit and confirmed in 2005 when radial velocity studies of the star indicated another, more distant and massive companion orbiting the star. The planet has an eccentric orbit lasting on order of a decade.

^ ^a ^b ^c ^d ^e Cite error: The named reference Feng2015 was invoked but never defined (see the help page).
^ Cite error: The named reference Vogt2005 was invoked but never defined (see the help page).

[Feng2015-1] Cite error: The named reference Feng2015 was invoked but never defined (see the help page).

[Vogt2005-2] Cite error: The named reference Vogt2005 was invoked but never defined (see the help page).

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