61 Virginis d

61 Virginis d

Exoplanet		List of exoplanets
Parent star
Star		61 Virginis
Constellation		Virgo
Right ascension	(α)	13h 18m 24.3s
Declination	(δ)	−18° 18′ 40.3″
Apparent magnitude	(mV)	4.74
Distance		27.8±0.2 ly (8.52±0.05 pc)
Spectral type		G5V
Mass	(m)	0.95+0.04 −0.03 M☉
Radius	(r)	0.940+0.034 −0.029 R☉
Temperature	(T)	5585 K
Metallicity	[Fe/H]	−0.02
Age		6.1–6.6 Gyr
Orbital elements
Semi-major axis	(a)	0.476±0.001 AU (71.2 Gm)
Periastron	(q)	0.311 AU (46.6 Gm)
Apastron	(Q)	0.640 AU (95.8 Gm)
Eccentricity	(e)	0.35±0.09
Orbital period	(P)	123.01±0.55 d (0.33678 y)
Orbital speed	(υ)	42.2 km/s
Argument of periastron	(ω)	314±20°
Time of periastron	(T0)	2453369.166 JD
Physical characteristics
Minimum mass	(m sin i)	22.9±2.6 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		Unconfirmed
Database references
Extrasolar Planets Encyclopaedia		data
SIMBAD		data
Exoplanet Archive		data
Open Exoplanet Catalogue		data

61 Virginis d (abbreviated 61 Vir d) is a proposed exoplanet orbiting the 5th apparent-magnitude G-type main-sequence star 61 Virginis in the constellation Virgo. 61 Virginis d would have a minimum mass of 22.9 times that of Earth and orbits nearly one-half the distance to the star as Earth orbits the Sun with an eccentricity of 0.35. This planet would most likely be a gas giant like Uranus and Neptune.

This planet was induced on 14 December 2009 from using a precise radial velocity method taken at Keck and Anglo-Australian Observatories. As of 2012 it has not been confirmed by other measurements such as from HARPS.

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  61VirginisSystem