50_Cancri
50 Cancri
Star in the constellation Cancer
50 Cancri is a single[9] star in the zodiac constellation of Cancer, located 183 light years away from the Sun.[1] It has the Bayer designation A2 Cancri; 50 Cancri is the Flamsteed designation. It is faintly visible to the naked eye as a white-hued star with an apparent visual magnitude of 5.89.[2] The star is moving away from the Earth with a heliocentric radial velocity of 23 km/s, having come to within 118 light-years some 1.2 million years ago.[2]
This is a chemically peculiar A-type main-sequence star with a stellar classification of A1 Vp.[3] It is a Lambda Boötis star displaying strongly-depleted iron peak and alpha process elements, but otherwise relatively normal solar abundances.[5] The star shows no variability down to a detection limit of 1.6 millimagnitudes.[10] It is 264[6] million years old with a relatively low projected rotational velocity of 18 km/s.[7] 50 Cancri has 2.1[5] times the mass of the Sun and is radiating 11[5] times the Sun's luminosity from its photosphere at an effective temperature of 8,340 K.[5]
50 Cancri has an infrared excess, which most likely indicates a debris disk in orbit around the host star. A blackbody model of the emission shows a two component fit, with the warm section having a temperature of 246±91 K at a radius of 4±3 AU from the star, and a cool component at 108±21 K with a separation of 22±8 AU.[5]