L 728-1

[ α=2.2h, δ=-14.4° | M2.5V | d=19.8 pc ]
GJ 3139 , HIP 10072 , TYC 5283-1331-1
Best fit:
Tstar = 3490 ± 10 K , Lstar = 0.0329 ± 0.0002 LSun , Rstar = 0.496 ± 0.004 RSun