@article{d93de424c1634151905be84eb0e17758,
title = "The global thermophysical properties of (433) Eros",
abstract = "We present results from a shape-based, rotationally-resolved thermophysical model of near-Earth asteroid (433) Eros, using reflected and near-IR spectra collected at the NASA Infrared Telescope Facility (IRTF) over 18 nights (25 disk-integrated spectra in total) from 2009 to 2019. The data sample a variety of viewing geometries, illumination angles, and rotational phases and therefore allow us to characterize Eros's surface physical properties in detail, particularly at wavelengths in the thermal near-IR regime (λ > 3.5 μm) that were not measured by the NEAR Shoemaker mission. Eros's shape, spin state, density, albedo, and other physical properties measured by NEAR were incorporated into our model, leaving thermal inertia and surface roughness as free parameters. We find that a thermal inertia range of 100–150 J m−2 K−1 s-1/2 and a roughness crater fraction of 0.3–0.4 with crater opening angle 130° (equivalent adirectional rms slope angle of 32° +/− 4°) fit data from 18 spectra at the 1σ level, but do not fit the remaining 7 spectra. This suggests that Eros's thermal properties vary over its surface, which has important implications for linking remote sensing data to spacecraft measurements of the physical properties of near-Earth asteroids.",
keywords = "Asteroid, Eros, Near earth, Near infrared, Thermophysical",
author = "Hinkle, {M. L.} and Howell, {E. S.} and Fern{\'a}ndez, {Y. R.} and C. Magri and Vervack, {R. J.} and Marshall, {S. E.} and Crowell, {J. L.} and Rivkin, {A. S.}",
note = "Funding Information: M. Hinkle acknowledges support from the Center for Lunar and Asteroid Surface Science , a NASA Solar System Exploration Virtual Institute . The authors thank the anonymous reviewers for comments and suggestions which improved the manuscript. All authors but C. Magri were Visiting Astronomers at the Infrared Telescope Facility , which is operated by the University of Hawaii under contract 80HQTR19D0030 with the National Aeronautics and Space Administration . Some of the data utilized in this publication were obtained and made available by the MIT-UH-IRTF Joint Campaign for NEO Reconnaissance . M. L. H. was partially supported by NASA grant 80NSSC21K0658 , NASA 80NSSC19K0523 support of Arecibo, and NASA grants NNA14AB05A & 80NSSC19M0214 , SSERVI Center for Lunar and Asteroid Surface Science . E.S.H. was partially supported by the NASA OSIRIS-REx Asteroid Sample Return Mission contract NNM10AA11C — Marshall Space Flight Center . S.E.M. was partially supported by NASA Earth and Space Science Fellowship NNX15AR14H . R.J.V., Y.R.F., and C.M. were partially supported by NSF grant AST-0808064 . R.J.V., Y.R.F., E.S.H., and C.M. were partially supported by NSF grant AST-1109855 . E.S.H. and S.E.M. were partially supported by NASA grant NNX12AF24G . E.S.H., S.E.M., and J.L.C. were partially supported by NASA grant NNX13AQ46G . Funding Information: M. Hinkle acknowledges support from the Center for Lunar and Asteroid Surface Science, a NASA Solar System Exploration Virtual Institute. The authors thank the anonymous reviewers for comments and suggestions which improved the manuscript. All authors but C. Magri were Visiting Astronomers at the Infrared Telescope Facility, which is operated by the University of Hawaii under contract 80HQTR19D0030 with the National Aeronautics and Space Administration. Some of the data utilized in this publication were obtained and made available by the MIT-UH-IRTF Joint Campaign for NEO Reconnaissance. M. L. H. was partially supported by NASA grant 80NSSC21K0658, NASA 80NSSC19K0523 support of Arecibo, and NASA grants NNA14AB05A & 80NSSC19M0214, SSERVI Center for Lunar and Asteroid Surface Science. E.S.H. was partially supported by the NASA OSIRIS-REx Asteroid Sample Return Mission contract NNM10AA11C ? Marshall Space Flight Center. S.E.M. was partially supported by NASA Earth and Space Science Fellowship NNX15AR14H. R.J.V. Y.R.F. and C.M. were partially supported by NSF grant AST-0808064. R.J.V. Y.R.F. E.S.H. and C.M. were partially supported by NSF grant AST-1109855. E.S.H. and S.E.M. were partially supported by NASA grant NNX12AF24G. E.S.H. S.E.M. and J.L.C. were partially supported by NASA grant NNX13AQ46G. Publisher Copyright: {\textcopyright} 2022",
year = "2022",
month = aug,
doi = "10.1016/j.icarus.2022.114939",
language = "English (US)",
volume = "382",
journal = "Icarus",
issn = "0019-1035",
publisher = "Academic Press Inc.",
}