HR 8799 c
Astronomical discovery
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HR 8799 c is an extrasolar planet located approximately 129 light-years away in the constellation of Pegasus, orbiting the 6th magnitude Lambda Boötis star HR 8799. This planet has a mass between 5 and 10 Jupiter masses and a radius from 20 to 30%... Wikipedia
Discovered: November 13, 2008
Apparent magnitude (V): 5.964
Mean radius: 1.3 RJ
Discovery site: W. M. Keck Observatory Headquarters and Gemini North Telescope
Detection method: Direct imaging
Mass: 7+3; −2 MJ
Orbital period (sidereal): ~ 190 y