HD 90089

HD 90089 is a star system located in the northern circumpolar constellation Camelopardalis. With a combined apparent magnitude of 5.25, it is faintly visible to the naked eye under ideal conditions. This star is located relatively close at a distance of 75 light years, but is drifting away at a rate of almost 8 km/s.
This is an astrometric binary system, initially indicated through Gaia astrometry, and validated in 2026 with the direct detection of the secondary component. The observed separation was of 0.024" along a position angle of 182.4°. The main component of HD 90089 is an F4 main-sequence star with the calcium K-line and metallic lines of an F2 star. Although the spectral type is of a form that would indicate an Am star, it is not listed in any of the major catalogues of chemically peculiar stars. The secondary is only 0.45 magnitudes fainter than the primary.
An infrared excess has been detected around this system, most likely indicating the presence of a circumstellar disk at a radius of 145 AU. The temperature of this dust is 30 K.
In addition to the inner pair, there is an M0 companion separated 13" away and at approximately the same distance.