  In this paper, we investigate thermophysical characteristics of near-Earth
asteroid (341843) 2008 EV5, based on our improved Advanced Thermal Physical
Model (ATPM) by considering the contribution of sunlight-reflection for rough
surface, along with four wavebands observations from Wide-field Infrared Survey
Explorer (WISE) and the radar-derived shape model. Here we derive that 2008 EV5
has a relatively low thermal inertia of $\Gamma=110 _{-12}^{+40}\rm~J m^{-2}
s^{-1/2} K^{-1}$ but a high roughness fraction. The geometric albedo and
effective diameter are then constrained to be $p_v=0.095_{-0.003}^{+0.016}$ and
$D_{\rm eff}=431_{-33}^{+6}\rm~m$, respectively. The low thermal inertia
indicates that 2008 EV5 may have undergone sufficient space weathering over
secular evolution. The high roughness may have resemblances to the appearances
of Bennu and Ryugu recently observed by spacecrafts, where a great number of
boulders are widely distributed on the asteroid's surface. Moreover, we
numerically perform 1000 backward simulations of 2008 EV5's cloned orbits
within 1 Myr to explore its origin, and present a probability of $\sim6.1\%$
that the asteroid originates from the main belt. Finally, we estimate that the
mean grain size of the surface ranges from 0.58 to 1.3 mm, and infer that it is
unlikely to find water ice on most area of 2008 EV5, but there may exist water
ice on high-latitudes near polar region.
