Porrima

Porrima is a star in the constellation Virgo. It is also known by its Bayer designation, Gamma Virginis. Porrima is a binary star system, meaning it consists of two stars orbiting a common center of mass. These two stars are nearly identical in mass and spectral type, both being A-type main-sequence stars. They are also quite close to each other in their orbit, making them a challenging binary to resolve from Earth.

The orbital period of Porrima is approximately 171 years. This relatively short orbital period for a binary star system has allowed astronomers to observe a significant portion of their orbit and study the dynamics of their system. The stars are separated by a distance that varies throughout their orbit, but it is generally quite small. Because of their similar brightness and close proximity, Porrima has historically been a subject of interest for stellar observation and measurement.

Porrima is located approximately 36 light-years away from Earth. Its apparent magnitude is around 2.7, making it one of the brighter stars in Virgo. The system is notable for its spectroscopic binary nature and has been used as a benchmark for studying stellar evolution and binary star dynamics. The precise orbital parameters of Porrima have been determined through extensive astrometric observations.