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Alrescha

Alpha Piscium (Alpha Psc, α Piscium, α Psc) is the Bayer designation for a star in the equatorial constellation of Pisces. It has the traditional name Alrescha (Al Rescha, Alrischa, Alrisha). Less known names are Kaitain and Okda.

The distance to α Psc is about 139 light years. The system comprises a close double star with angular separation of presently 1.8" between the components. The main star is of magnitude +4.33 and spectral type A0p, while the companion is magnitude 5.23 and belongs to spectral class A3m. The two stars take more than 700 years to orbit one another and they will make their closest approach to each other around 2060. One or both of the stars may be a spectroscopic binary as well. The stars have masses of 2.3 and 1.8 solar masses respectively and shine with a total luminosity of 31 and 12 times that of the Sun.

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