CM Draconis (GJ 630.1A) is an eclipsing binary star system 48.5 light-years (14.9 parsecs) away in the constellation of Draco (the Dragon).

The system consists of two nearly identical red dwarf stars that orbit each other with a period of 1.268 days and a separation of 2.6 million kilometres (0.017 AU).

Consequently, the system plays an important role in testing stellar structure models for very low mass stars.

[9] Given the system's distance of 47 light years,[10] this corresponds to a separation of at least 370 astronomical units between CM Draconis and GJ 630.1B.

[11][12] Based on variations in the timing of the system's eclipses, it has been suggested that there may be an object in a circumbinary orbit around the two red dwarf stars.