GJ 1245

GJ 1245 (Gliese 1245) is a double star with components G 208-44 and G 208-45, located 15.2 ly away in the constellation Cygnus. G 208-44 is itself a closer double star made up of two red dwarfs, while G 208-45 is also a red dwarf. GJ 1245 is the 43rd closest stellar system to the Solar System. GJ 1245 A and B are active flare stars, and the pair are collectively designated V1581 Cygni.

The largest of the three stars, GJ 1245 A (G 208-44 A) is only 12% the Sun's mass. Of the other two stars, GJ 1245 C (G 208-44 B), is closest to star A at 2 AU away; it is 8% of the Sun's mass. The third star, GJ 1245 B (G 208-45), is 27 AU away from star A, and is 10% of the Sun's mass; it would appear as bright as Venus does from Earth when viewed from star A.