Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alpha Lupi is the brightest star in the constellation Lupus. Alpha Lupi is a giant star of spectral type B1.5. In 1956 it was identified as a Beta Cephei variable. The variability period is 0.29585 days. The magnitude varies by about 0.03, or about 3% of the total luminosity. A small star situated near Alpha Lupi may just be an optical companion. This star is a member of the Scorpius-Centaurus Association, the nearest OB association to the Sun. This is a gravitationally unbound stellar association with an estimated age of 16 20 million years. The association is also the source of a bubble of hot gas that contains the Sun.