Tags: Star.
Pi Herculis (π Her π Herculis) is a third-magnitude star in the constellation Hercules. As one of the four stars in the Keystone asterism (see yellow quadrangle) is one of the more easily recognized in the constellation. It has an apparent visual magnitude of +3.2 which is visible to the naked eye and makes it one of the brighter members of the constellation. The Hipparcos satellite mission estimated its distance at roughly 115 parsecs from Earth or about 377 light years away.
