Tags: Star.
Lambda Boötis (λ Boo λ Boötis) is a star in the constellation Boötes.Lambda Boötis is a white A-type main sequence dwarf with an apparent magnitude of +4.18. It is approximately 97.1 light-years from Earth. Lambda Boötis is the prototype of a group of rare stars known as Lambda Boötis stars all of which are dwarf stars with unusually low abundances of metals in their spectra. Its diameter has been directly measured to be 1.7 times that of the Sun.