Delta Arietis

Delta Arietis (δ Ari, δ Arietis) is the Bayer designation for a star in the northern constellation of Aries. It has the traditional name Botein which is derived from the Arabic word for "belly". The apparent visual magnitude of this star is 4.35, which is bright enough to be viewed with the naked eye. It has an annual parallax shift of 19.22 mas; corresponding to a physical distance of approximately 170 light-years (52 parsecs) from Earth.

This is an evolved giant star with a stellar classification of K2 III. It belongs to a population known as red clump giants, which means it is generating energy through the fusion of helium at its core. With close to twice the mass of the Sun, the outer envelope has expanded until it is around ten times the Sun's radius. It shines with 45 times the Sun's luminosity at an effective temperature of 4,810 K, giving it the orange-hued glow of a K-type star. It is a suspected variable star that ranges in magnitude from 4.33 to 4.37.