**Table 3:** Central wavelengths of CH4-ice bands measured in the laboratory and in the spectrum of 136 199 Eris, with uncertainties of about 0.0004 $\mu$ m.
CH4^a ( $\mu$ m)	This work ( $\mu$ m)	Licandro et al. (2006) ( $\mu$ m)
0.7296	0.7288	0.7296
0.8897	0.8885	0.8881

^a Grundy et al. (2002).

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