HR 8799 e
Astronomical observation
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HR 8799 e is a large exoplanet, orbiting the star HR 8799, which lies 129 light-years from Earth. This gas giant is between 5 and 10 times the mass of Jupiter. Due to their young age and high temperature all four discovered planets in the HR 8799... Wikipedia
Mean radius: 1.17+0.13; −0.11 RJ
Surface gravity: 104.3 ± 0.3 cm s−2
Discovered: November 22, 2010
Inclination: 25 ± 8°
Mass: 9.6+1.9; −1.8 MJ
Orbital period (sidereal): ~ 50 y
Semi-major axis: ~ 14.5 ± 0.5 AU; 16.4+2.1; −1.1 AU
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