61 Virginis d

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61 Virginis d
Extrasolar planet List of extrasolar planets
Artist's impression of 61 Virginis d.jpg
An artist's impression of 61 Virginis d.
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
Radius (r) 0.940+0.034
Temperature (T) 5585 K
Metallicity [Fe/H] −0.02
Age 6.1–6.6 Gyr
Orbital elements
Semimajor 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
(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[1]
Database references
Extrasolar Planets
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.[2][3] As of 2012 it has not been confirmed by other measurements such as from HARPS.[1]


  1. ^ a b M. C. Wyatt et al. (2012). "Herschel imaging of 61 Vir: implications for the prevalence of debris in low-mass planetary systems". MNRAS. arXiv:1206.2370. Bibcode:2012MNRAS.424.1206W. doi:10.1111/j.1365-2966.2012.21298.x. 
  2. ^ Vogt, Steven (2009). "A Super-Earth and two Neptunes Orbiting the Nearby Sun-like star 61 Virginis". arXiv:0912.2599v1 [astro-ph.EP]. 
  3. ^ Tim Stephens (2009-12-14). "New planet discoveries suggest low-mass planets are common around nearby stars". UCSC News. UC Santa Cruz. Archived from the original on 23 December 2009. Retrieved 2009-12-14. 

External links[edit]

Coordinates: Sky map 13h 18m 24.3s, −18° 18′ 40.3″