**Table 3:** Europa's limb-darkening parameter.
Minnaert para-	$\lambda$	Solar phase	Method	Reference
meter k	[nm]	angle $\alpha$
0.60	410^c	$4^\circ5$	Mutual event (ESO)	Descamps et al. (1992)
0.57	800^c	$4^\circ5$	Mutual event (Pic du Midi)	Descamps et al. (1992)
0.63^a,e	410-580^d	$2^\circ9$	Voyager 1	Buratti & Veverka (1983)
0.67^a,f	410-580^d	$3^\circ8$	Voyager 2	Buratti & Veverka (1983)
0.58	395-895^b	$8{-}11^\circ$	Modulated photometry	Present work (R=1562 km)

^a Average value on terrain type and wavelength.
^b Hipparcos H_p broad passband.
^c Effective wavelength.
^d The range corresponds to different filters.
^e Subspacecraft longitude of $341^\circ$ .
^f Subspacecraft longitude of $33^\circ$ .

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