orange star in the southern regions of Andromeda, lying directly southward of the Andromeda Galaxy, and also directly westward of the Triangulum Galaxy in the sky. Delta Andromedae can be found roughly halfway between the two brighter stars Alpheratz (also called Sirrah) and Mirach, respectively the Alpha and Beta stars of Andromeda. At 106 light years, Delta Andromedae is only a slightly more distant from the Solar System than Alpheratz, but only about half the distance to the intensely luminous Mirach.
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Andromedae is a binary, and probably multiple, system. The primary star is an orange giant more than sixteen times the diameter of the Sun, which appears to be surrounded by a circumstellar disc of material. It has at least one companion star, Delta Andromedae B, which is a red dwarf in a distant, millennia-long orbit. Analysis of the primary star's spectrum implies the existence of another companion star in a much closer orbit, though this remains to be confirmed.
A further faint
star appears close by in the sky, designated Delta Andromedae C, but this does not appear to be physically related to the orange giant and its system, and its apparent proximity is more likely to be due to its line of sight from Earth.