}}{{Starbox reference
| Simbad = 8+And
}}{{Starbox end}}8 Andromedae, abbreviated 8 And, is a probable triple star[17] system in the northern constellation of Andromeda. 8 Andromedae is the Flamsteed designation. It is visible to the naked eye with an apparent visual magnitude of 4.82.[3] Based upon an annual parallax shift of {{Val|6.1|ul=mas}},[1] it is located 540 light years from the Earth. It is moving closer with a heliocentric radial velocity of −8 km/s.[6]The primary component is an aging red giant star with a stellar classification of {{nowrap|M2.5 III Ba0.5}}.[4] The suffix notation indicates this is a mild barium star, which means the stellar atmosphere is enriched with s-process elements. It is either a member of a close binary system and has previously acquired these elements from a (now) white dwarf companion or else it is on the asymptotic giant branch and is generating the elements itself.[22] This is a periodic variable of unknown type, changing in brightness with an amplitude of 0.0161 magnitude at a frequency of 0.23354 d−1, or once every 4.3 days.[23]
The third component is a magnitude 13.0 star at an angular separation of {{Val|7.8|ul=arcsecond}} along a position angle of 164°, as of 2015.[24]
References
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