first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method B Bus-DeMeo NIR Binzel 2019Icar..324...41B SPEC L K 0.420000 0.290000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC X-complex Bus-DeMeo VIS Birlan 2024A&A...689A.334B PHOT