first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method S-complex Bus-DeMeo NIR Binzel 2019Icar..324...41B SPEC S 0.474 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT S 1.000000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC Sqw Binzel 2010Natur.463..331B SPEC