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 P C 0.630000 0.370000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC P C 0.770000 0.220000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC X 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT Xk Bus-DeMeo VISNIR DeMeo 2009Icar..202..160D SPEC