Alhena (HIP 31681)
Alhena is a white subgiant star in the constellation Gemini. At 109 light years away, it is the 44th brightest star in the Earth's sky, where it shines at an apparent visual magnitude of 1.93. Alhena is the primary component of a multiple-star system. The iron abundance of Alhena is -0.28 (52.5% of the Sun). It is moving through the Galaxy at a speed of 15.5 km/s relative to the Sun. Its projected Galactic orbit carries it between 22,700 and 32,200 light years from the center of the Galaxy. It will come closest to the Sun 1.7 million years from now when it will brighten to magnitude 0.74 from a distance of 63 light years.
Sky position: RA 6h 37.7m, Dec +16° 24'
