Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alpha¹ Capricorni is a binary star in the constellation Capricornus. It also has the traditional star name Prima Giedi or Algiedi Prima, and shares the name Algedi with ² Capricorni. The name Giedi Prime is used for a fictional planet in Frank Herbert's 1965 science fiction novel Dune. It is approximately 690 light years from Earth. The primary component, ¹ Capricorni A, is a yellow G-type supergiant with an apparent magnitude of +4.30. Its companion, ¹ Capricorni B, is an eighth magnitude star, separated by 0.65 arcseconds from the primary.