Fig. 4
Combined lightcurve of asteroid (21) Lutetia using photometric data in R broadband filter at different observing nights (March 19, 20, and 21, see Table 1). The zero rotational phase was chosen to occur at JD = 2 455 273.3094 (March 17 at 19:25 UTC). The rotational period inferred from this combined lightcurve was derived to be P = 8.16 ± 0.08 h.
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