61 Virginis c

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61 Virginis c
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) 0.2175±0.0001 AU
(32.54 Gm)
Periastron (q) 0.1863 AU
(27.88 Gm)
Apastron (Q) 0.2487 AU
(37.20 Gm)
Eccentricity (e) 0.14±0.06
Orbital period(P) 38.021±0.034 d
(0.10409 y)
Orbital speed (υ) 62.45 km/s
Argument of
(ω) 341±38°
Time of periastron (T0) 2453369.166 JD
Physical characteristics
Minimum mass(m sin i)18.2±1.1 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 Confirmed[1]
Database references
Extrasolar Planets
Exoplanet Archivedata
Open Exoplanet Cataloguedata

61 Virginis c (abbreviated 61 Vir c) is an exoplanet orbiting the 5th apparent-magnitude G-type main-sequence star 61 Virginis in the constellation Virgo. 61 Virginis c has a minimum mass of 18.2 times that of Earth and orbits one-fifth the distance to the star as Earth orbits the Sun, at a precise distance of 0.2175 AU with an eccentricity of 0.14. This planet would most likely be a gas giant like Uranus and Neptune. This planet was discovered on 14 December 2009 from using a precise radial velocity method taken at Keck and Anglo-Australian Observatories.[2][3]

See also[edit]


  1. ^ 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:1206.2370Freely accessible. 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:0912.2599Freely accessible [astro-ph.EP]. 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″