first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method X 0.920000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC C X Bus-DeMeo NIR Binzel 2019Icar..324...41B SPEC X Bus VIS Lin 2018P&SS..152..116L PHOT