Lambda Tauri [SEP] constellation
Lambda Tauri
Lambda Tauri (λ Tau, λ Tauri) is a triple star system in the constellation Taurus. In the "Calendarium of Al Achsasi Al Mouakket", this star was designated "Sadr al Tauri", which was translated into Latin as "Pectus Tauri", meaning "the bull chest". In 1848, the light from this system was found to vary periodically and it was determined to be an eclipsing binary system—the third such discovered. The components of this system have a combined apparent visual
magnitude of +3.47, making it one of the brighter members of the constellation. Based upon parallax measurements from the Hipparcos mission, the distance to this system is approximately .
The inner pair of this triple star system, Lambda Tauri AB, orbit around each other with a period of 3.95 days and a low eccentricity of about 0.025. Their orbital plane is inclined by around 76° to the line of sight from the Earth, so it is being viewed from nearly edge on and the two stars form an Algol-