Early in the paper is this gem: "Although mainly designed for observations of extragalactic sources, the SDSS is significantly contributing to studies of the solar system, notably in the success it has had with asteroid detections, cataloged in the SDSS Moving Object Catalog (hereafter SDSS MOC, Ivezi´c et al., 2001). This public, value-added, catalog of SDSS asteroid observations contains, as of its fourth release, 471,000 measurements of moving objects, 220,000 of which have been matched to 104,000 known asteroids from the ASTORB file
" Wow!!! Some 251,000 measurements of moving objects not yet matched to known solar system objects!!!!
There's an citizen science project in there, for sure.