  In this work, we investigate the size, thermal inertia, surface roughness and
geometric albedo of 10 Vesta family asteroids by using the Advanced
Thermophysical Model (ATPM), based on the thermal infrared data acquired by
mainly NASA's Wide-field Infrared Survey Explorer (WISE). Here we show that the
average thermal inertia and geometric albedo of the investigated Vesta family
members are 42 $\rm J m^{-2} s^{-1/2} K^{-1}$ and 0.314, respectively, where
the derived effective diameters are less than 10 km. Moreover, the family
members have a relatively low roughness fraction on their surfaces. The
similarity in thermal inertia and geometric albedo among the V-type Vesta
family member may reveal their close connection in the origin and evolution. As
the fragments of the cratering event of Vesta, the family members may have
undergone similar evolution process, thereby leading to very close thermal
properties. Finally, we estimate their regolith grain sizes with different
volume filling factors.
