first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S Sr Bus-DeMeo NIR Binzel 2019Icar..324...41B SPEC S Sr Bus-DeMeo VISNIR McGraw 2022PSJ.....3..243M SPEC Xe X-complex Bus-DeMeo VIS Hromakina 2021A&A...656A..89H PHOT