Kappa Coronae Borealis b is an extrasolar planet approximately 98 light-years away[3] in the constellation of Corona Borealis. This planet was discovered by Johnson et al., who used the radial velocity method to detect wobbling of the star caused by a planet move around by its tug of gravity. It was first discovered in September 2007 and was published in November.[1]
Discovery[1] | |
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Discovered by | Johnson et al. |
Discovery site | Lick Observatory |
Discovery date | 2007 |
Detection method | Doppler spectroscopy |
Orbital characteristics[2] | |
Semi-major axis | 2.65±0.13 AU |
Eccentricity | 0.167±0.032 |
Orbital period (sidereal) | 1285±14 d |
Time of perihelion | 2456830±51 JD |
Argument of perihelion | 194±14 º |
Semi-amplitude | 26.18±0.86 m/s |
Star | Kappa Coronae Borealis |
Physical characteristics[2] | |
Mass | ≥1.811±0.057 MJ |
The planet is 1.8 Jupiter masses, or 570 Earth masses, although only the minimum mass is known since the inclination is not known. It orbits at a distance of 2.7 astronomical units, or 400 gigameters, and takes 1,208 days, or 3.307 years, to orbit around Kappa Coronae Borealis.
Constellation of Corona Borealis | |||||||||
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