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70 Virginis 

70 Virginis

70 Virginis system as rendered in Celestia
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation
(pronunciation)
Virgo
Right ascension 13h 28m 25.8s
Declination +13° 46' 43.5"
Apparent magnitude (V) +5.00
Characteristics
Spectral type G2.5Va
U-B color index 0.26
B-V color index 0.71
V-R color index 0.39
R-I color index 0.36
Variable type none
Astrometry
Radial velocity (Rv) 5 km/s
Proper motion (μ) RA: −234.81 mas/yr
Dec.: −576.19 mas/yr
Parallax (π) 56.11 ± 0.24[1] mas
Distance 58.1 ± 0.2 ly
(17.82 ± 0.08 pc)
Absolute magnitude (MV) +3.75
Details
Mass 1.1 M
Radius 1.76 R
Surface gravity (log g) 3.58
Luminosity 3.06 L
Temperature 5770 K
Metallicity −0.03 [Fe/H]
Rotation unknown
Age 8,200 million years
Other designations
HD 117176, HR 5072, BD+14°2621, Gl 512.1, WDS 13284+1347A, and SAO 100582.
Database references
SIMBAD data

70 Virginis is a yellow dwarf star approximately 58 light-years away in the constellation Virgo. It is rather unusually bright for its spectral type and may be just starting to evolve into the subgiant phase.

In 1996, 70 Virginis was discovered to have an extrasolar planet in orbit around it.[2] There is also a dust disc at a temperature of 156 K located about 3.4 AU from the star.[3]

Planetary system

The 70 Virginis system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity
b >7.49 ± 0.61 MJ 0.484 ± 0.028 116.6884 ± 0.0044 0.4007 ± 0.0035
Dust disc 3.4 AU

References

  1. ^ van Leeuwen, F. (2007). "HIP 65721". Hipparcos, the New Reduction. Retrieved on 2008-08-17.
  2. ^ Marcy, Geoffrey W.; Butler, R. Paul (1996). "A Planetary Companion to 70 Virginis". The Astrophysical Journal Letters 464: L147 – L151. doi:10.1086/310096. 
  3. ^ Trilling, D. E.; Bryden, G.; Beichman, C. A.; Rieke, G. H.; Su, K. Y. L.; Stansberry, J. A.; Blaylock, M.; Stapelfeldt, K. R.; Beeman, J. W.; Haller, E. E. (2008). "Debris Disks around Sun-like Stars". The Astrophysical Journal 674 (2): 1086 – 1105. doi:10.1086/525514. 

External links

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