Thermal properties of asteroid 21 Lutetia from Spitzer Space Telescope observations

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Table 2:

Thermal inertia I and beaming factor $\eta$ of asteroid 21 Lutetia derived from the SST data, for two different values of the geometric albedo.
	Nominal value $p_{\rm v}=0.13$ $^{\dag }$		Extreme value $p_{\rm v}=0.26$ $^{\ddag }$
I	$\eta$ ^a	$\chi^2$	$\eta^{a}$	$\chi^2$
(JK^-1m^-2s^-1/2)		(Jy²)		(Jy²)
0	$0.83\pm0.05$	69	$0.78\pm0.05$	69
10	$0.76\pm0.05$	79	$0.72\pm0.05$	79
20	$0.71\pm0.05$	83	$0.67\pm0.05$	83
30	$0.67\pm0.05$	84	$0.63\pm0.05$	84
40	$0.64\pm0.05$	83	$0.60\pm0.05$	84
50	$0.61\pm0.05$	82	$0.57\pm0.05$	81

Notes. ^(a) The uncertainty of $\pm$ 0.05 on $\eta$ is obtained by doubling the $\chi^2$ value.

References. $^{\dag }$ : Lamy et al. (2010); $^{\ddag }$ : Mueller et al. (2006).

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