61 Virginis

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61 Virginis
Observation data
Epoch J2000
Constellation
(pronunciation)
Virgo
Right ascension 13h 18m 24.3s
Declination -18° 18′ 40.3″
Apparent magnitude (V) 4.74
Characteristics
Spectral type G5-6 V
U-B color index 0.26
B-V color index 0.71
V-R color index 0.37
R-I color index 0.33
Variable type None
Astrometry
Radial velocity (Rv) -8.2 km/s
Proper motion (μ) RA: -1,069.90 mas/yr
Dec.: -1,063.78 mas/yr
Parallax (π) 117.35 ± 0.69 mas
Distance 27.8 ± 0.2 ly
(8.52 ± 0.05 pc)
Absolute magnitude (MV) 5.07
Details
Mass 0.96 M
Radius 0.94 R
Surface gravity (log g) 4.47
Luminosity 0.78 L
Temperature 5604 K
Metallicity 93-95%
Rotation <17 km/s.
Age ? years
Other designations
Gl 506, HR 5019, BD -17°3813, HD 115617, LHS 349, LTT 5111, GCTP 3039.00, SAO 157844, FK5 1345, GC 18007, BDS 6447, CCDM 13185-1818, LPM 467, LFT 990, HIP 64924.

61 Virginis is a star similar to the Sun, located about 27.8 light-years away in the constellation of Virgo.

There is some evidence that it may have a jovian planet, but seems not to have a nearby massive companion.[1] A subsequent study also failed to find the large substellar companion (with 20 to 80 times the mass of Jupiter) or a Jupiter-class planet[2], therefore it is a good candidate for possessing a family of terrestrial planets, including life-bearing planets somewhat like the Earth, with an orbit slightly less and a year slightly smaller than that of the Earth.

[edit] External links


[edit] References

  1. ^ Campbell et al, 1988, pages 904, 906, and 919
  2. ^ Cumming et al, 1999