61 Virginis c

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61 Virginis c
Extrasolar planet List of extrasolar planets
ConceptJKV-61Vir-c.png
Artist's concept of 61 Vir c in Celestia
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
Semimajor 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
periastron
(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
Encyclopaedia
data
SIMBAD data

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]

References[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″