40 Arietis

40 Arietis (abbreviated 40 Ari) is a binary star system in the northern constellation of Aries. 40 Arietis is the Flamsteed designation. Their combined apparent magnitude is 5.82, putting the system near the limit of naked eye visibility. Based upon an annual parallax shift of just 7.06 mas, it is 460 light-years (140 parsecs) away from the Sun, give or take a 30 light-year margin of error. At that distance, its brightness is diminished by 0.21 in magnitude from extinction caused by interstellar gas and dust.

This is a spectroscopic binary with an angular separation of 0.2 arcseconds between the two components. Their merged spectrum matches that of an evolved giant star with a stellar classification of K1 III.