BD+21 1764B

[ α=8.1h, δ=21.1° | M3.0V | d=17.9 pc ]
GJ 3482 , TYC 1389-170-2
Best fit:
Tstar = 3349 ± 8 K , Lstar = 0.0538 ± 0.0005 LSun , Rstar = 0.689 ± 0.006 RSun