KX Andromedae

KX Andromedae is a spectroscopic binary star in the constellation Andromeda. Its apparent visual magnitude varies between 6.88 and 7.28. It is at a distance of.
The primary component of the KX Andromedae system is a Be star with a spectral classification B3pe as of 2017, although in historical records it has varied from B1 to B7.
The secondary star is difficult to detect in the spectrum, but has been given a K1III spectral type. It is likely to be an asymptotic giant branch star that fills its Roche lobe, transferring mass to the primary star.
The system is only about 25 million years old. The pair complete a circular orbit every 38.919 days at an inclination of.
KX Andromedae is surrounded by bipolar jets of ejected material, that extend out from it in each direction. These faint jets, visible in hydrogen-alpha, were discovered in 2024 by astronomer Stefan Ziegenbalg.