User:Kepler-1229b/sandbox/Rho Coronae Borealis b

Rho Coronae Borealis b (ρ CrB b / ρ Coronae Borealis b) is an extrasolar planet approximately 57 light-years away in the constellation of Corona Borealis. The planet was discovered orbiting the Solar twin, yellow dwarf star Rho Coronae Borealis in April 1997 (one of the first discovered). The planet's distance to the star is only about one fifth Earth's distance from the Sun. The orbit is circular and it takes 40 days to complete one revolution around the star. The planet has a mass about that of Jupiter. However, the inclination of the orbital plane is not known, so the value is only a minimum.

In 2000 a group of scientists claimed, based on preliminary Hipparcos astrometrical satellite data, that the inclination of the planet would be 0.5° and the mass would be as much as 115 times Jupiter's mass. Such a massive body would be nothing else but a dim red dwarf. However, this is statistically very improbable, and the claim has not been backed up.