first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method C Tholen VIS Alvarez-Candal 2006A&A...459..969A SPEC C P 0.320000 0.280000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC X 0.641 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT