Astronomy & Astrophysics

Table 1: Position of methane lines. Laboratory data from Grundy et al. (2002), Pluto data (with uncertainties $\sim$ 10 Å) from Grundy & Fink (1996).
Band Pure methane ( $\AA$ ) 2005 FY₉ ( $\AA$ ) Pluto ( $\AA$ )

$3\nu_1 + 4\nu_4$ 7299 7296 7290

$3\nu_3 + 3\nu_4$ 7862 7860 -

$3\nu_1 + 3\nu_4$ 7993 7888 8015

$\nu_1 + 3\nu_3$ 8442 8437 8430

$3\nu_3 + 2\nu_4$ 8691 8685 8690

$2\nu_1 + \nu_3 + 2\nu_4$ 8897 8891 8885

$2\nu_3 + 4\nu_4$ 9019 9015 -

**Table 1:** Position of methane lines. Laboratory data from Grundy et al. (2002), Pluto data (with uncertainties $\sim$ 10 Å) from Grundy & Fink (1996).
Band	Pure methane ( $\AA$ )	2005 FY₉ ( $\AA$ )	Pluto ( $\AA$ )
$3\nu_1 + 4\nu_4$	7299	7296	7290
$3\nu_3 + 3\nu_4$	7862	7860	-
$3\nu_1 + 3\nu_4$	7993	7888	8015
$\nu_1 + 3\nu_3$	8442	8437	8430
$3\nu_3 + 2\nu_4$	8691	8685	8690
$2\nu_1 + \nu_3 + 2\nu_4$	8897	8891	8885
$2\nu_3 + 4\nu_4$	9019	9015	-

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