first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method Q Sq Bus-DeMeo NIR Lucas 2017Icar..291..268L SPEC S 1.000000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC Sw Bus-DeMeo VISNIR Lucas 2019Icar..322..227L SPEC