1 Arietis

1 Arietis is a double star in the northern constellation of Aries. 1 Arietis is the Flamsteed designation. The pair have a combined visual magnitude of 5.86, making it faintly visible to the naked eye. Based upon an annual parallax shift of 5.57 mas, the distance to the two stars is approximately 590 ly. As of 2016, the secondary had an angular separation of $6.95$ along a position angle of 165° from the primary. They are moving further from the Earth with a heliocentric radial velocity of +7 km/s.

The brighter star, designated component A, is a magnitude 6.40 giant star with a stellar classification of K1 III. The companion star, component B, is a magnitude 7.20 A-type main sequence star with a classification of A6 V. Helmut Abt (1985) had this star classified as A3 IV, matching a more evolved subgiant.