Example UKIDSS K-band image of J131012.68+001809.3 from the UKIDSS Merger Sample. The UKIDSS imaging provides accurate absolute astrometry, enabling the direct overlay of the SDSS (blue cross) and WISE (red cross) centroid positions. The 4﹩\mathop{.}\limits^{{\unicode{x02033}}}﹩914 offset between these centroids corresponds to distinct NIR emission components, separated by 4﹩\mathop{.}\limits^{{\unicode{x02033}}}﹩961, resolved by UKIDSS but unresolved by WISE. This figure demonstrates that SDSS/WISE astrometric offsets trace physically distinct merger-driven substructure.