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The Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect is a net torquecaused by solar radiation directly reflected and thermally re-emitted from thesurface of small asteroids and is considered to be crucial in their dynamicalevolution. By long-term photometric observations of selected near-Earthasteroids, it's hoped to enlarge asteroid samples with a detected YORP effectto facilitate the development of a theoretical framework. Archived light-curvedata are collected and photometric observations are made for (1685) Toro and(85989) 1999 JD6, which enables measurement of their YORP effect by invertingthe light curve to fit observations from a convex shape model. For (1685) Toro,a YORP acceleration $\upsilon=(3.2\pm0.3)\times10^{-9}\ \rm{rad\cdotd^{-2}}(1\sigma\ error)$ is updated, which is consistent with previous YORPdetection based on different light-curve data; for (85989) 1999 JD6, it isdetermined that the sidereal period is $7.667749\pm 0.9$ h, the rotationpole direction locates is at $\lambda=232\pm 2^{\circ},\ \beta = -59\pm1^{\circ}$, the acceleration is detected to be $\upsilon =(2.4\pm0.3)\times10^{-8}\ \rm{rad\cdot d^{-2}}(1\sigma\ error)$ and in additionto obtaining an excellent agreement between the observations and model. YORPshould produce both spin-up and spin-down cases. However, including (85989)1999 JD6, the $\rm{d}\omega/\rm{d}t$ values of eleven near-Earth asteroids arepositive totally, which suggests that there is either a bias in the sample ofYORP detections or a real feature needs to be explained.

Shape model and rotation acceleration of (1685) Toro and (85989) 1999 JD6 from optical observations