Struve 2398 is a binary star system about 11.4 light-years away from our Sun, in the northeastern part of the constellation Draco. Both components are red dwarfs, and both are suspected to be flare stars. At magnitudes 8.94 and 9.70, both are too dim to be seen with the naked eye. The separation of the two components was first measured in 1832 by Friedrich Georg Wilhelm von Struve, who published his findings on 2,640 double stars in 1837.
The orbital period of the pair is about 408 years, with an average distance of about 56 AU. The eccentricity of their orbit is 0.53, which brings the pair between 26 and 86 AUs apart. Struve 2398 A is a main-sequence red dwarf of spectral class M3.0 V. It contains about 36% of the Sun's mass, 54% of its diameter, and 1/370th of its luminosity. Struve 2398 B is a main-sequence red dwarf star of spectral class M3.5 V; it contains 30% of the Sun's mass, is 55% of its diameter, and has about 1/770th of its luminosity. Struve 2398 B is a flare star.
A search for faint companions by the Hubble Space Telescope found no evidence for any large Jupiter- or brown dwarf-sized objects nearby.