  Low-inclination Near-Earth Asteroid (297274) 1996 SK, which is also
classified as a Potentially Hazardous Asteroid, has a highly eccentric orbit.
It was studied by multi-wavelength photometry within the framework of an NEA
color survey at the Lulin Observatory. We report here the finding of large
color variation across the surface of (297274) 1996 SK within one asteroidal
rotation period of $4.656\pm0.122$ hours and classify it as a S-type asteroid
according to its average colors of $B-V=0.767\pm0.033$, $V-R=0.482\pm0.021$,
$V-I=0.801\pm0.025$ and the corresponding relative reflectance spectrum. It
might be indicative of differential space weathering effect or compositional
inhomogeneity of the surface materials.
