Asteroid shapes and thermal properties from combined optical and mid-infrared photometry inversion

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Table 1

Number of dense light curves N_lc, sparse data points N_sp, and IRAS and WISE observations.

Asteroid	N _lc	N _sp	IRAS				WISE		reduced
				12 μm	25 μm	60 μm	100 μm	11 μm	22 μm

21	Lutetia^a	59		5	5	5	9			0.80
220	Stephania		397	2	2	2		11	11	0.58
306	Unitas	15	386	11	11	11		10	13	0.68
2867	Šteins	21	614					12	12	0.77

Notes. The goodness of fit to the thermal data is expressed by the reduced .

^(a)

For Lutetia, we did not use sparse data because 20 of the set of 59 dense light curves were calibrated. The IR data set also contained data from the Spitzer and Herschel telescopes.

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