Alpha Sagittarii

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Alpha Sagittarii (α Sgr / α Sagittarii) is a star in the constellation of Sagittarius. It also has the traditional name Rukbat, derived from the Arabic Ar-Rukbah = the knee.

Rukbat is a blue, class B dwarf star. It is not particularly bright, with a magnitude of +3.96.

Fiction

In Anne McCaffrey's Dragonriders series, Rukbat is the star about which the planet of Pern orbits; its depiction in these novels differs in several ways from reality, most notably the star being depicted as yellow, class G.

In the Sailormoon manga, the Galaxy Cauldron, the source of all life, lies within Zero Star, which exists in the center of Alpha Sagittarii.

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