Lightcurve fits to best-fit models from selected YORP planes. All models have the same starting epoch, T₀ = 2456416.0. The examplelight curve was taken at T₀ = 22 yr (Wisniewski et al. 1997, labelled “ID 2” in Table 1). All models have been developed using the same light curve set as the nominal best-fit model (see Table 3). Left panel: YORP-induced slow-down model, with ν = −0.07 × 10⁻⁷ rad day⁻² and rotation pole λ = 47°, β = −62°. Middle panel: nominal model, with ν = 0 rad day⁻² and rotation pole λ = 47°, β = −62°. Right panel: model showing a YORP-induced spin-up, with ν = 0.17 × 10⁻⁷ rad day⁻² and rotation pole λ = 51°, β = −61°. The quality of the light curve fit for all three models is very close.