No spectral features have been found so far which can be attributed to particular chemical compounds, although the Cassini observations yielded evidence for absorption bands near 0.8 μm and 2.2 μm.
Non se atoparon características espectrais que permitan identificar compostos químicos concretos, aínda que as observacións da Cassini mostraron evidencias na banda de absorción preto de 0,8 μm e 2,2 μm.