70 Virginis

from Wikipedia, the free encyclopedia
Star
70 Virginis
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Virgin
Right ascension 13 h 28 m 25.81 s
declination + 13 ° 46 ′ 43.6 ″
Apparent brightness 5.00 likes
Typing
Known exoplanets 1
B − V color index +0.71 
U − B color index +0.26 
R − I index +0.39 
Spectral class G5 V
Astrometry
Radial velocity (+4.9 ± 0.9) km / s
parallax (55.22 ± 0.73)  mas
distance (59.1 ± 0.8)  ly
(18.1 ± 0.2)  pc  
Visual absolute brightness M vis +3.7 mag
Proper movement 
Rec. Share: (−236.02 ± 0.24)  mas / a
Dec. portion: (−575.73 ± 0.19)  mas / a
Physical Properties
Dimensions 1.1  M ☉
Metallicity [Fe / H] −0.03
Other names
and catalog entries
Flamsteed name 70 Virginis
Bonn survey BD + 14 ° 2621
Bright Star Catalog HR 5072 [1]
Henry Draper Catalog HD 117176 [2]
Hipparcos catalog HIP 65721 [3]
SAO catalog SAO 100582 [4]
Tycho catalog TYC 898-1042-1 [5]Template: Infobox star / maintenance / specification of the TYC catalog
Other names FK5  1349

70 Virginis is a yellow dwarf in the constellation Virgo, 59 light years away . It has an apparent brightness of 5.0 mag and can therefore barely be seen with the naked eye on clear nights.

What is unusual about this star is that it is very bright for its spectral type G5. This anomaly also meant that the distance to this star was misjudged for a long time. This value was only corrected by measurements from the Hipparcos satellite.

In 1996, Geoffrey Marcy and R. Paul Butler discovered a massive celestial body orbiting 70 Virginis. This planet, which was one of the first extrasolar planets to be discovered , is called 70 Virginis b . But it may also be a so-called brown dwarf .

Web links

Commons : 70 Virginis  - Collection of Images, Videos and Audio Files
  • SolStation.com: 70 Virginis. Retrieved May 9, 2015 . (English)

Individual evidence

  1. ↑ a b c d Hipparcos catalog
  2. ↑ a b c SIMBAD database
  3. ↑ a b c Bright Star Catalog