first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S 0.970000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC Sr Sv Bus-DeMeo VISNIR Popescu 2011A&A...535A..15P SPEC Sv Bus-DeMeo NIR Binzel 2019Icar..324...41B SPEC