1 Answers
Pi Herculis is a third-magnitude star in the constellation Hercules. As one of the four stars in the Keystone asterism , it is one of the constellation's more easily recognized. It has an apparent visual magnitude of +3.2, which is visible to the naked eye and makes it one of its brighter members. The Hipparcos satellite mission estimated its distance at roughly 115 parsecs from Earth, or about 377 light years away. The overall reduction in the star's visual magnitude due to extinction from the intervening matter is 0.11.
4 views
Answered