  The Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) effect is a net torque
caused by solar radiation directly reflected and thermally re-emitted from the
surface of small asteroids and is considered to be crucial in their dynamical
evolution. By long-term photometric observations of selected near-Earth
asteroids, it's hoped to enlarge asteroid samples with a detected YORP effect
to facilitate the development of a theoretical framework. Archived light-curve
data are collected and photometric observations are made for (1685) Toro and
(85989) 1999 JD6, which enables measurement of their YORP effect by inverting
the light curve to fit observations from a convex shape model. For (1685) Toro,
a YORP acceleration $\upsilon=(3.2\pm0.3)\times10^{-9}\ \rm{rad\cdot
d^{-2}}(1\sigma\ error)$ is updated, which is consistent with previous YORP
detection based on different light-curve data; for (85989) 1999 JD6, it is
determined that the sidereal period is $7.667749\pm 0.000009$ h, the rotation
pole direction locates is at $\lambda=232\pm 2^{\circ},\ \beta = -59\pm
1^{\circ}$, the acceleration is detected to be $\upsilon =
(2.4\pm0.3)\times10^{-8}\ \rm{rad\cdot d^{-2}}(1\sigma\ error)$ and in addition
to obtaining an excellent agreement between the observations and model. YORP
should 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 are
positive totally, which suggests that there is either a bias in the sample of
YORP detections or a real feature needs to be explained.
