first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C Bus VIS Binzel 2019Icar..324...41B PHOT C 0.07 Bus VIS Carvano 2010A&A...510A..43C PHOT S S 0.0588 0.0588 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT