Alpha Herculis, also known as Ras Algethi, is the brightest star in the constellation Hercules. It is a red giant star located approximately 100 light-years away from Earth. With a magnitude of about 2.09, it is easily visible to the naked eye and serves as a prominent feature in the night sky. This star is classified as a spectral type M5 III, indicating its cool temperature and large size. Alpha Herculis is part of a binary star system, which means it has a companion star orbiting around it. Its unique characteristics make it an interesting subject for astronomers studying stellar evolution.