BD+21 1764

[ α=8.1h, δ=21.1° | K7Ve | d=17.9 pc ]
GJ 3481 , HIP 39826 , TYC 1389-170-1
Best fit:
Tstar = 4140 ± 10 K , Lstar = 0.1036 ± 0.0006 LSun , Rstar = 0.625 ± 0.004 RSun