66 Cancri is a binary star[9] system near the northern border of the zodiac constellation of Cancer, located 474 light years away from the Sun.
It is visible to the naked eye as a faint, white-hued star with a combined apparent visual magnitude of 5.87.
[2] The pair are moving closer to the Earth with a heliocentric radial velocity of −13 light years.
[6] As of 2003, the magnitude 8.56 companion was located at an angular separation of 4.43″ along a position angle of 134° from the primary.
[9] The brighter member of the system, designated component A, is an A-type main-sequence star with a stellar classification of A2 V.[2] It is around 162[2] million years old with a high rate of spin, showing a projected rotational velocity of 183 km/s.