Tau⁴ Serpentis, Latinized from τ⁴ Serpentis, is a variable M-type giant star in the constellation of Serpens, approximately 710 light-years from the Earth.
With a spectral classification M5IIIa, Tau⁴ Serpentis is a cool red giant star. The... Wikipedia
Surface temperature: 4,489 K
Distance: 710 ± 40 ly; (220 ± 10 pc)