Magnitude 4.81 Apparent magnitude (V) 4.81 | Constellation Virgo | |
People also search for Kappa Virginis, Psi Virginis, 74 Virginis | ||
Phi Virginis (φ Vir, φ Virginis) is a binary star in the zodiac constellation of Virgo. It can be seen with the naked eye, having an apparent visual magnitude of +4.81. There is a magnitude 9.10 companion at an angular separation of 5.160 arcseconds. The distance to this system, as determined via parallax measurements, is roughly 118 light years.
The primary component has a stellar classification of G2 IV, indicating that it is a G-type subgiant which is evolving away from the main sequence. It is slightly variable with an amplitude of 0.m06. The star has about 1.8 times the mass of the Sun, 4 times the Sun's radius, and shines with 12.6 times the luminosity of the Sun. It is around 1.5 billion years old and is spinning with a projected rotational velocity of 15.5 km/s. The effective temperature of the star's outer atmosphere is 5,534 K.
The system is a source of X-ray emission with a luminosity of 7013215800000000000♠2.158×1020 erg/s. A second visual companion lies at an angular separation of 91.40 arcseconds along a position angle of 202°, as of 2000.