first_spec_class second_spec_class prob_first_spec_class prob_second_spec_class taxonomy wavelength author ref method B Bus VIS Luo 2024AJ....167...13L SPEC C Bus-DeMeo VISNIR Hasegawa 2024AJ....167..224H SPEC X 0.701 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT