HD 1461 b

HD 1461 b

Exoplanet		List of exoplanets
Parent star
Star		HD 1461
Constellation		Cetus
Right ascension	(α)	00h 18m 41.62s
Declination	(δ)	−08° 03′ 9.5″
Apparent magnitude	(mV)	6.47
Distance		76 ly (23.3 pc)
Spectral type		G0V
Mass	(m)	1.08 ± 0.04 M☉
Radius	(r)	1.095 ± 0.026 R☉
Temperature	(T)	5765 ± 18 K
Metallicity	[Fe/H]	0.19 ± 0.01
Age		6.3 Gyr
Orbital elements
Semi-major axis	(a)	0.063434 ± 0.000008 AU (9.4896 Gm)
Periastron	(q)	0.061078 AU (9.1371 Gm)
Apastron	(Q)	0.065791 AU (9.8422 Gm)
Eccentricity	(e)	0.04 ± 0.01
Orbital period	(P)	5.7722 ± 0.0011 d
		(138.53 h)
Orbital speed	(υ)	119.96 km/s
Argument of periastron	(ω)	186 ± 63°
Time of periastron	(T0)	2450366.936 JD
Physical characteristics
Minimum mass	(m sin i)	8.1 ± 0.7 M⊕
Discovery information
Discovery date		2009-12-14
Discoverer(s)		Vogt et al.
Discovery method		Radial velocity
Discovery site		Keck Observatory Anglo-Australian Observatory
Discovery status		Preprint
Database references
Extrasolar Planets Encyclopaedia		data
SIMBAD		data
Exoplanet Archive		data
Open Exoplanet Catalogue		data

HD 1461 b is an extrasolar planet, orbiting the 6th magnitude G-type star HD 1461, 76 light years away in the constellation Cetus. This planet has a minimum mass 8.1 times that of Earth and orbits at a precise distance of 0.063434 AU with an eccentricity of 0.04. It is currently unknown whether the planet is a gas giant like Uranus or Neptune, or has terrestrial composition like CoRoT-7 b. This planet was discovered on 14 December 2009 from using radial velocity method at Keck and Anglo-Australian Observatories.