Observation of 10 Vesta asteroids with WISE/NEOWISE

Here, we show that the average thermal inertia and geometric albedo of the investigated Vesta family members are 42J/m^2^/s^1/2^/K and 0.314, respectively, where the derived effective diameters are less than 10km.

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 members may reveal their close connection in origin and evolution. As the fragments of the cratering event of Vesta, the family members may have undergone a similar evolutionary process, thereby leading to very close thermal properties.