Upsilon Orionis (υ Ori, υ Orionis) is a star in the constellation Orion. It has the traditional name Thabit (Arabic for "the imperturbable one"). Since 1943, the spectrum of this star has served as one of the stable anchor points by which other stars are classified.
Thabit belongs to the spectral class B0V and has apparent magnitude +4.62. Thabit is approximately 1545 light years from Earth.