first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method D Bus-DeMeo VISNIR Popescu 2011A&A...535A..15P SPEC D Bus VIS Binzel 2004M&PS...39..351B SPEC S Bus-DeMeo VIS Gherase 2024MNRAS.535.3077G SPEC Xe Bus-DeMeo VISNIR Binzel 2019Icar..324...41B SPEC