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Eta Orionis (η Ori) is a star system at a distance of 900 light years from Earth and part of the Orion Arm. Eta Orionis is part of the constellation of Orion and lies a little to the west of Orion's belt between Delta Orionis and Rigel, being closer to Delta Orionis than to Rigel. It is an eclipsing binary system consisting of two blue stars orbiting one another in a regular pattern.