IRTF Data Archive Program Information

# # Program information file # PROGRAM_ID 2022A073 PROGRAM_TITLE Understanding Space Weathering in the Koronis Asteroid Family PROGRAM_INV1 Cristina Thomas PROGRAM_INV2 Andy Rivkin PROGRAM_INV3 David Trilling PROGRAM_INV4 PROGRAM_INV5 PROGRAM_SCICAT main-belt / Trojan asteroids PROGRAM_ABSTRACT_BEG We propose to obtain near-infrared [0.7-2.5-micron] SpeX prism spectra of 8-10 small [D~2-4km] Koronis family members to identify 'fresh' Q-type objects, investigate space weathering spectral effects, and determine composition. The Koronis family is one of the best studied families in the Main Belt, which makes it an excellent candidate for additional in-depth spectral investigations. The old S-type family has been shown to have an ordinary chondrite-like composition and display changes in spectral slope associated with space weathering. All potential targets have spectrophotometric slopes and shapes similar to those of Q-type asteroids. If confirmed, these objects would be the first Q-types discovered in an old Main Belt asteroid family and would change our understanding of the presence and distribution of Q-type material in the Main Belt. We will propose to complete this effort in 3 semesters [2021B-2022B]. Our past work has indicated that SNR~50 is sufficient for accurate taxonomic classification and compositional analysis. We request a total of 7.75 hours [< 1 night] for 2022A. PROGRAM_ABSTRACT_END