Fig. 10

Results of the YORP search for asteroid (85990) 1999 JV6, based on the convex-light-curve-inversion procedures described in Sect. 3.1. For a set of YORP factors a grid of possible pole positions was tested with shape and period optimised at each point. The quality of the fit, χ2, was recorded and the smallest value of χ2 from each search is plotted here against the YORP factor. Left: full range of YORP factors investigated, right: zoomed-in view of the region around the minimum χ2 values. A YORP-induced spin-up of 2 × 10−8 rad day2 gives the best fit to the light-curve data, but the constant period solution cannot be discarded. The horizontal lines mark the increases above the best-fit χ2 minimum: + 1% (green) and + 10% (red).
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