  Thermophysical models allow for improved constraints on the physical and
thermal surface properties of asteroids beyond what can be inferred from more
simple thermal modeling, provided a sufficient number of observations is
available. We present thermophysical modeling results of observations from the
NEOWISE mission for two near-Earth asteroids which are the targets of the
DESTINY+ flyby mission: (3200) Phaethon and (155140) 2005 UD. Our model assumes
a rotating, cratered, spherical surface, and employs a Monte Carlo Markov Chain
to explore the multi-dimensional parameter space of the fit. We find an
effective spherical diameter for Phaethon of $4.6^{+0.2}_{-0.3}~$km, a
geometric albedo of $p_V=0.16\pm0.02$, and a thermal inertia $\Gamma=880$
$^{+580}_{-330}$, using five epochs of NEOWISE observations. The best model fit
for (155140) 2005 UD was less well constrained due to only having two NEOWISE
observation epochs, giving a diameter of $1.2\pm0.4~$km and a geometric albedo
of $p_V=0.14\pm0.09$.
