参宿四, also known as Beta Orionis, is a bright star located in the constellation Orion. It is part of a group of stars known as the Orion Nebula, which is one of the most famous and recognizable constellations in the night sky. This star is classified as a blue supergiant and is approximately 1,200 light-years away from Earth. The name 参宿四 comes from Chinese astronomy, where it is associated with the Three Stars in the Orion constellation. In Western astronomy, it is often referred to as Rigel. With a magnitude of about 0.18, it is one of the brightest stars visible from Earth, making it an important navigational reference for stargazers and astronomers alike.