first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method E Tholen VISNIR Fornasier 2008Icar..196..119F SPEC S 0.960000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC X Tholen VIS Lazzaro 2004Icar..172..179L SPEC Xe Bus VIS Lazzaro 2004Icar..172..179L SPEC