Photometric models of disk-integrated observations of the OSIRIS-REx target Asteroid (101955) Bennu

摘要: Abstract We used ground-based photometric phase curve data of the OSIRIS-REx target Asteroid (101955) Bennu and low angle from (253) Mathilde as a proxy to fit with Minnaert, Lommel-Seeliger, (RObotic Lunar Orbiter) ROLO, Hapke, McEwen models, which capture global light scattering properties surface subsequently allow us calculate geometric albedo, integral, spherical Bond average normal albedo for Bennu. find that has reflectance values, such multiple is expected be insignificant. Our models relate Bennu’s viewing geometry functions incidence, emission, angles. Radiance Factor (RADFs) are model disk-resolved brightness The Hapke work equally well in fitting best works reasonably at angles 20° 70°. calculated values 0.047 - 0.014 + 0.012 , 0.005 0.048 0.022 ROLO respectively consistent 0.045 ± 0.015 computed by Emery et al. (Emery, J.P. [2014]. Icarus 234, 17–35) Hergenrother (Hergenrother, C.W. http://arxiv.org/abs/1409.4704 >). Also, our 0.016 0.004 0.015 0.001 0.003 0.007 Minnaert model, value 0.017 ± 0.002 presented 17–35). On other hand, semi-physical where several assumptions approximations were necessary, not supported disk-integrated data, indicating measurements will necessary constrain these expected.