Variation in bolometric albedo A (top A), superheating factor S_heat (middle B), and color (bottom C) with phase angle using data taken after 11 August 2015. Data are from spectra with TEST_3.0 < 1.35; the best data (TEST_3.0 < 1.1) are shown with squares. (A) The dashed line is the phase function measured during MTP020 by Bertini et al. (2017; OSIRIS green filter –537 nm). (B) The dashed line is a linear fit to S_heat data with a slope of –0.0014 deg⁻¹ (–0.33 K deg⁻¹ at r_h = 1.35 AU). The dash-dotted line is from the near-Earth asteroid thermal model (NEATM) with beaming parameter η = 1.6, emissivity ϵ = 0.9, and r_h = 1.35 AU. The solid line is from our dust thermal model (Sect. 5.2) with thermal parameter Θ = 0.1, optical depth fraction of isothermal particles f_iso = 0.8, f_heat = 1.05, and ϵ = 0.9. (C) The dashed line is a linear fit to the data giving a phase reddening of 0.032%/100 nm deg⁻¹.