Nu_Gruis
Nu Gruis
Star in the constellation Grus
ν Gruis, Latinised as Nu Gruis, is a solitary,[9] yellow-hued star in the southern constellation of Grus. It is visible to the naked eye with an apparent visual magnitude of 5.47.[2] The distance to this star, as determined using an annual parallax shift of 11.6 mas as seen from the Earth,[1] is 280 light years. It is drifting further away with a heliocentric radial velocity of +11 km/s.[4]
This is an evolved G-type giant star with a stellar classification of G9 III,[3] a star that has used up its core hydrogen and has expanded. At present it has ten[1] times the radius of the Sun and is radiating 52[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,893 K.[7] It has a visual magnitude 12.50 companion, not visible even through binoculars, located at an angular separation of 21.70 arc seconds along a position angle of 74°, as of 2011.[10]