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 that a sufficient number of observations is available. We present thermophysical modeling results of observations from the Near-Earth Object WISE (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 multidimensional parameter space of the fit. We find an effective spherical diameter for Phaethon of km, a geometric albedo of p V =0.16 +0.02, and a thermal inertia Γ =880 , 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 +0.4 km and a geometric albedo of p V =0.14 +0.09.
- asteroids: individual (Phaethon, 2005 UD)
- minor planets
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science