English Wikipedia page for a summary of asteroid types English en Wikipedia page for a summary of asteroid types English SMASS classification http://en.wikipedia.org/wiki/Asteroid_spectral_types Wikipedia/Asteroid Spectral Types Wikipedia page for a summary of asteroid types http://en.wikipedia.org/wiki/Asteroid_spectral_types Asteroid spectral types en English Spectral spectroscopic observations http://en.wikipedia.org/wiki/Asteroid_spectral_types Wikipedia page for a summary of asteroid types spectral class spectroscopic observations http://en.wikipedia.org/wiki/Asteroid_spectral_types http://en.wikipedia.org/wiki/Asteroid_spectral_types WP: Asteroid spectral types http://en.wikipedia.org/wiki/Asteroid_spectral_types Wikipedia on asteroid spectral types Messung des Reflexionsvermögens, der Farbe und des Spektrums Wikipedia page for a summary of asteroid types Wikipedia/Asteroid Spectral Types en spectral type kelas spektral asteroid English English Asteroid Spectral Types English Spectral types