Gliese_317
Gliese 317
Star in the constellation Pyxis
Gliese 317 is a small red dwarf star with two exoplanetary companions[3][8] in the southern constellation of Pyxis. It is located at a distance of 49.6 light-years from the Sun based on parallax measurements,[1] and is drifting further away with a radial velocity of +87.8 km/s.[3] This star is too faint to be viewed with the naked eye, having an apparent visual magnitude of 11.98[2] and an absolute magnitude of 11.06.[3]
This is an M-type main-sequence star with a stellar classification of M2.5V.[3] Photometric calibrations and infrared spectroscopic measurements indicate that the star is enriched in heavy elements compared to the Sun.[5] The star is estimated to be roughly five billion years old and has a low activity level for a star of its class.[3] It has 42%[3][4] of the mass and radius of the Sun and is spinning with a rotation period of 69 days.[6] The star is radiating 2.2%[4] of the Sun's luminosity from its photosphere at an effective temperature of 3,510 K.[3]