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

Rho Coronae Borealis b

Discovery
Discovered by	Noyes et al.
Discovery site	United States
Discovery date	24 April 1997
Detection method	Radial velocity
Orbital characteristics
Semi-major axis	0.229±0.013 AU
Eccentricity	0.057±0.028
Orbital period (sidereal)	39.8449±0.0063 d
Time of periastron	2,450,563.2±4.1
Argument of periastron	303
Semi-amplitude	64.9±2.4
Physical characteristics
Mass	>1.093±0.098
Temperature	~627 K

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.

See also

• Kappa Coronae Borealis b

References

• Noyes; Jha, Saurabh; Korzennik, Sylvain G.; Krockenberger, Martin; Nisenson, Peter; Brown, Timothy M.; Kennelly, Edward J.; Horner, Scott D.; et al. (1997). "A Planet Orbiting the Star ρ Coronae Borealis". The Astrophysical Journal Letters. 483 (2): L111–L114. arXiv:astro-ph/9704248. Bibcode:1997ApJ...483L.111N. doi:10.1086/310754. {{cite journal}}: Explicit use of et al. in: |author= (help)
• Butler; Wright, J. T.; Marcy, G. W.; Fischer, D. A.; Vogt, S. S.; Tinney, C. G.; Jones, H. R. A.; Carter, B. D.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. {{cite journal}}: Explicit use of et al. in: |author= (help)

External links

• "A Planet Orbiting the Star rho Coronae Borealis". Advanced Fiber Optic Echelle (AFOE). Harvard-Smithsonian Center for Astrophysics. Retrieved 2008-07-03.
• "Rho Coronae Borealis b". Extrasolar Visions. Retrieved 2008-07-03.
• "Rho Coronae Borealis". Jumk.de. Retrieved 2008-07-03.
• "Rho Coronae Borealis". SolStation. Retrieved 2008-07-03.

Category:Exoplanets Category:Corona Borealis Category:Exoplanets discovered in 1997 Category:Gas giants Category:Exoplanets detected by radial velocity