61 Virginis b

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61 Virginis b
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
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) 0.050201±0.000005 AU
(7.5100 Gm)
Periastron (q) 0.044239 AU
(6.6181 Gm)
Apastron (Q) 0.056163 AU
(8.4019 Gm)
Eccentricity (e) 0.12±0.11
Orbital period (P) 4.2150±0.0006 d
    (101.16 h)
Orbital speed (υ) 130.01 km/s
Argument of
(ω) 105±54°
Time of periastron (T0) 2453369.166 JD
Physical characteristics
Minimum mass (m sin i) 5.1±0.5 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 Archive data
Open Exoplanet Catalogue data

61 Virginis b (abbreviated 61 Vir b) is an extrasolar planet, orbiting the 5th magnitude G-type star 61 Virginis, in Virgo. This planet has a minimum mass of 5.1 times that of Earth and is an example of a super-Earth planet. It orbits very close to the star, at a distance of 0.050201 AU with an eccentricity of 0.12. This planet was discovered on 14 December 2009 using the 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. 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″