first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method L Bus VIS Lazzaro 2004Icar..172..179L SPEC M L 0.600000 0.220000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC S Tholen VIS Lazzaro 2004Icar..172..179L SPEC