first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S Bus VIS Lazzaro 2004Icar..172..179L SPEC S Tholen VIS Lazzaro 2004Icar..172..179L SPEC S 0.990000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC