first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C Bus VIS Bus 2002Icar..158..146B SPEC C C 0.7363 0.7363 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT P 0.990000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC