HD 128311 c

HD 128311 c

Exoplanet		List of exoplanets
Parent star
Star		HD 128311
Constellation		Boötes
Right ascension	(α)	14h 36m 00.5607s
Declination	(δ)	+09° 44′ 47.466″
Distance		54.14 ly (18.04 pc)
Spectral type		K0V
Mass	(m)	0.8 M☉
Radius	(r)	0.73 R☉
Temperature	(T)	4965 K
Metallicity	[Fe/H]	0.03
Age		0.39 Gyr
Orbital elements
Semi-major axis	(a)	1.76 ± 0.11 AU
Periastron	(q)	1.46 AU
Apastron	(Q)	2.06 AU
Eccentricity	(e)	0.170 ± 0.090
Orbital period	(P)	928 ± 18 d (2.54 y)
Orbital speed	(υ)	20.7 km/s
Argument of periastron	(ω)	200° ± 150°
Time of periastron	(T0)	2,450,010 ± 400 JD
Semi-amplitude	(K)	76.2 ± 4.6 m/s
Physical characteristics
Minimum mass	(m sin i)	3.22 ± 0.49 MJ (1020 ± 160 M⊕)
Discovery information
Discovery date		June 24, 2005
Discoverer(s)		Vogt et al.
Discovery method		Doppler spectroscopy
Discovery site		California, USA
Discovery status		Published
Database references
Extrasolar Planets Encyclopaedia		data
SIMBAD		data
Exoplanet Archive		data
Open Exoplanet Catalogue		data

HD 128311 c is an exoplanet located approximately 54 light-years away in the constellation of Boötes. This planet orbits in an eccentric orbit at 1.76 AU from its star (HD 128311). The planet has minimum mass 3.22 Jupiter masses.