70 Virginis
Star 70 Virginis |
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AladinLite | |||||||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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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 |
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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 |
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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
- ↑ a b c d Hipparcos catalog
- ↑ a b c SIMBAD database
- ↑ a b c Bright Star Catalog