HD 204313 b

HD 204313 b

Extrasolar planet		List of extrasolar planets
Parent star
Star		HD 204313
Constellation		Capricornus
Right ascension	(α)	21h 28m 12.2063s
Declination	(δ)	–21° 43′ 34.517″
Apparent magnitude	(mV)	7.99
Distance		154.50 ± 4.53 ly (47.37 ± 1.39 pc)
Spectral type		G5V
Orbital elements
Semimajor axis	(a)	3.082 ± 0.055 AU
Periastron	(q)	2.678 AU
Apastron	(Q)	3.486 AU
Eccentricity	(e)	0.131 ± 0.023
Orbital period	(P)	1931 ± 18 d (5.29 ± 0.05 y)
Argument of periastron	(ω)	-57 ± 11°
Time of periastron	(T0)	3989 ± 62 JD
Physical characteristics
Minimum mass	(m sin i)	4.05 ± 0.17 MJ
Discovery information
Discovery date		August 11, 2009
Discoverer(s)		Segransan et al.
Detection method		Radial velocity (CORALIE)
Discovery site		La Silla Observatory
Discovery status		Published
Other designations
HIP 106006 b
Database references
Extrasolar Planets Encyclopaedia		data
SIMBAD		data

HD 204313 b is an extrasolar planet which orbits the G-type main sequence star HD 204313, located approximately 155 light years away in the constellation Capricorn. This planet orbits the star at a distance of 3.082 astronomical units and takes 1931 days or 5.29 years to revolve around the star. It has minimum mass four times that of Jupiter. However the radius and inclination are not known since this planet was not detected by transit method or direct imaging. Instead, this planet was detected by radial velocity method using the CORALIE Echelle spectrograph mounted on the 1.2 meter Euler Swiss Telescope located at La Silla Observatory in Atacama desert, Chile on August 11, 2009.

References

• Segransan et al. (2009). "The CORALIE survey for southern extrasolar planets. XVI. Discovery of a planetary system around HD 147018 and of two long period and massive planets orbiting HD 171238 and HD 204313". arXiv:0908.1479.