first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S Bus-DeMeo VISNIR DeMeo 2009Icar..202..160D SPEC S Bus VIS Bus 2002Icar..158..146B SPEC S 0.960000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC S Ds Movis NIR Popescu 2018A&A...617A..12P PHOT