first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method L Bus-DeMeo VISNIR Binzel 2019Icar..324...41B SPEC L M 0.540000 0.400000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC S-complex Bus-DeMeo VIS Birlan 2024A&A...689A.334B PHOT