IRTF Data Archive Program Information

# # Program information file # PROGRAM_ID 2022B054 PROGRAM_TITLE Constraining thermal properties of Near-Earth Object with MIRSI PROGRAM_INV1 Maxime Devogele PROGRAM_INV2 Joseph Masiero PROGRAM_INV3 Andy Lopez-Orquendo PROGRAM_INV4 Nicholas Moskovitz PROGRAM_INV5 PROGRAM_SCICAT near-Earth objects PROGRAM_ABSTRACT_BEG Asteroid surfaces are fractal structures with scales ranging from the meter-size craters or boulders to the micrometer-sized particles composing the regolith. Several techniques have been developed to assess the size of these structures. However, when used independently they fail to provide a full picture of the asteroid surface texture. We are proposing to use several techniques ranging from polarimetry, spectroscopy, radar delay-doppler, and photometry to obtain a full characterization of a sample of selected Near-Earth objects and derive the grain size or surface structure using independent techniques. During the 2022B we are proposing to observe the asteroid [2212] Hephaistos with MIRSI using 6 different filters. We are estimating Hephaistos thermal flux ranging from 0.2 to 5 Jy in December and January. When it will be around 0.2 Jy we will only obtain measurements in the 10.5 micron filter. As it gets brighter we will obtain measurements with additional filter to improve our thermophysical modeling. PROGRAM_ABSTRACT_END