first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S 0.990000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC SI Bus VISNIR Sanchez 2013Icar..225..131S SPEC Sl Bus VIS Binzel 2019Icar..324...41B SPEC