first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C Bus VIS Luo 2024AJ....167...13L SPEC C Tholen VIS Fornasier 2014Icar..233..163F SPEC P 0.890000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC