55 Cancri is a binary star system located 41 light-years away from the Sun in the zodiac constellation of Cancer. It has the Bayer designation Rho¹ Cancri; 55 Cancri is the Flamsteed designation. The system consists of a G-type star and a smaller red dwarf.

Distance to Earth: 40.12 light years

B−V color index: 0.86 / 1.21

U−B color index: 0.65 / 1.66

Luminosity (bolometric): 0.63 L_☉

Absolute magnitude (M_V): +5.50

Did you know: In the 5-planet solution for the 55 Cancri system, the orbit of 55 Cancri c is mildly eccentric: at apoastron the planet is about 19% further from the star than it is at periastron.