Zeta_Gruis
Zeta Gruis
Star in the constellation Grus
Zeta Gruis, Latinised from ζ Gruis, is a solitary[7] star in the southern constellation of Grus. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.12.[2] Based upon an annual parallax shift of 24.5 mas as seen from the Earth,[1] the system is located about 133 light-years from the Sun.
This is an evolved K-type giant star with a stellar classification of K1 III Fe−1.2 CN−0.5,[3] where the suffix notation indicates underabundances of iron and cyanogen in the spectrum. Having exhausted the supply of hydrogen at its core, the star has expanded and cooled; at present it has 10[1] times the girth of the Sun. The star is radiating 46[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,778 K.[1]