  This work presents data processing, fitting procedure, modelling and
analyzing of 9-years infrared light curves provided by the WISE/NEOWISE
telescope, by which the regolith characteristics of Main-Belt Object (656)
Beagle is studied. We determine Beagle's effective diameter $D_{\rm
eff}=57.3^{+4.5}_{-2.2}$ km, geometric albedo $p_{\rm
v}=0.05^{+0.004}_{-0.007}$, mean roughness $\theta_{\rm RMS}=44\pm4^\circ$,
mean grain size $b=100^{+350}_{-90}~\mu$m, mean specific heat capacity $c_{\rm
p}=173\sim516\rm~JKg^{-1}K^{-1}$, mean thermal conductivity
$\kappa=0.7\sim1.3\times10^{-3}\rm~Wm^{-1}K^{-1}$ and mean thermal inertia
$\Gamma=14\sim32\rm~Jm^{-2}s^{-0.5}K^{-1}$. The albedo of Beagle is a little
anomalous that the albedos of Beagle's neighbouring asteroids are more close to
Themis, rather than Beagle itself. The W1-band near-infrared light curves don't
reveal significant heterogeneous NIR features on the surface of Beagle, being
inconsistent with the expectation of a family parent that has members with
diverse NIR spectral types. These results add new clues of Beagle probably
being an interloper or a sister, rather than the parent of its neighbouring
asteroids including the first main-belt comet (MBC) 133P, hence may lead to new
scenarios about the origin of famous MBC 133P. Besides, we found that
asteroidal shape models from inversion of optical light curves are imperfect
for modeling infrared lightcurves, thus could mislead evaluations of both the
heterogeneity of regolith reflectivity at near infrared and thermophysical
characteristics at thermal infrared.
