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Zeta Virginis
Binary star system in the constellation of Virgo / From Wikipedia, the free encyclopedia
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Zeta Virginis (ζ Virginis, abbreviated Zeta Vir, ζ Vir) is a binary star in the zodiac constellation of Virgo. It is visible to the naked eye with an apparent visual magnitude of +3.376 and is located about a half degree south of the celestial equator. Based on parallax measurements obtained during the Hipparcos mission, it is about 74 light-years (23 parsecs) distant from the Sun.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Virgo |
Right ascension | 13h 34m 41.591s[1] |
Declination | –00° 35′ 44.95″[1] |
Apparent magnitude (V) | +3.376[2] |
Characteristics | |
Spectral type | A3 V[3] |
U−B color index | +0.141[2] |
B−V color index | +0.114[2] |
Astrometry | |
Radial velocity (Rv) | –13.2[2] km/s |
Proper motion (μ) | RA: –280.48 ± 0.17[1] mas/yr Dec.: +49.05 ± 0.12[1] mas/yr |
Parallax (π) | 44.03 ± 0.19 mas[1] |
Distance | 74.1 ± 0.3 ly (22.71 ± 0.10 pc) |
Absolute magnitude (MV) | 1.64±0.05[4] |
Details | |
ζ Vir A | |
Mass | 2.041±0.024[4] M☉ |
Radius | 2.079±0.025[5] R☉ |
Luminosity | 17.885±0.252[5] L☉ |
Surface gravity (log g) | 4.12 cgs |
Temperature | 8247±52[5] K |
Rotational velocity (v sin i) | 222[6] km/s |
Age | 0.51[7] Gyr |
ζ Vir B | |
Mass | 0.168+0.012 −0.016[4] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
Close
The two components are designated Zeta Virginis A (officially named Heze /ˈhiːziː/, a mid-20th-century name for the system)[8][9] and B.