Light curves of the trans-Neptunian objects 1996 TP66 and 1994 VK8

We have obtained a number of CCD images of two trans-Neptunian objects, 199 4 VK8 and 1996 TP66, over two nights. The changes in magnitude of these obj ects have been examined, in a search for periodic variation. In the case of 1996 TP66, nothing other than random noise can be found to within the erro rs of similar to 0.04 mag. Although a periodic signal is found for 1994 VK8 , it appears to be an artefact, as the same frequency appears in the variat ion of sky brightness and is probably due to the sampling of the data. Howe ver, 1994 VK8 does exhibit a variation of similar to 0.5 mag. This would su ggest either significant non-sphericity or a change in surface composition over a large area. In either case 1994 VK8 warrants further investigation.