first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C Tholen VIS Xu 1995Icar..115....1X SPEC C M 0.690000 0.140000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC X 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT