61 Virginis d

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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
Distance27.8±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
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
(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 Archivedata
Open Exoplanet Cataloguedata

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]

See also[edit]


  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. 424: 1206–1223. 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". The Astrophysical Journal. 708: 1366–1375. arXiv:0912.2599. Bibcode:2010ApJ...708.1366V. doi:10.1088/0004-637X/708/2/1366.
  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″