Rho Coronae Borealis
Rho Coronae Borealis is a star similar to the Sun but of greater age, around which has been found a planet marginally more massive than Jupiter. This epistellar Jovian, the fourth of its type to be discovered, occupies a nearly circular, sub-Mercurian orbit around its host.
|Distance||55 light-years (16.7 pc)|
|Spectral type||G0 V or G2 V|
|Temperature||5,480°C (5,750 K)|
|Luminosity (Sun = 1)||1.8|
|Mass (Sun = 1)||0.89|
|Mass (Jupiter = 1)||1.13|
|Semi-major axis||0.25 AU (37.5 million km, 23.3 million mi.)|
|Orbital period||39.65 days|
|Year of discovery||1997|
|Discoverer||Robert Noyes et al (AFOE)|
|Method of discovery||radial velocity|
1. Noyes, R., et al. "A Planet Orbiting the Star Rho Coronae Borealis," Astrophysical Journal, 483, 111 (1997).