Spica
Spica, also designated α Virginis (Latinised to Alpha Virginis, abbreviated Alpha Vir, α Vir), is the brightest object in the constellation of Virgo and one of the 20 brightest stars in the night sky. Analysis of its parallax shows that it is located 250 ± 10 light years from the Sun. It is a spectroscopic binary star and rotating ellipsoidal variable; a system whose two stars are so close together they are egg-shaped rather than spherical, and can only be separated by their spectra. The primary is a blue giant and a variable star of the Beta Cephei type.
Spica, along with Arcturus and Denebola or Regulus depending on the source, is part of the Spring Triangle asterism, and by extension, also of the Great Diamond together with the star Cor Caroli.
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