first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S Bus-DeMeo VISNIR Binzel 2019Icar..324...41B SPEC S Bus VISNIR Binzel 2004Icar..170..259B SPEC S Q 0.900000 0.100000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC