Struve 2398 (Gliese 725) is a binary star system in the northern constellation of Draco.

Although the components are too faint to be viewed with the naked eye, this star system is among the closest to the Sun.

Parallax measurements by the Gaia spacecraft give them an estimated distance of 11.5 light-years (3.5 parsecs) away.

They each display the type of variability common to flare stars,[9] and their active surfaces are sources of X-ray emission.

In 2016, an Earth-mass planet candidate on a 2.7-day orbit was proposed around Struve 2398 B based on radial velocity observations, although this could not be confirmed as a periodic signal.