2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/178451I present a model-independent spherically symmetric density estimator to be used in the cross-correlation of imaging catalogs with objects of known redshift. The estimator is a simple modification of the usual projected density estimator, with weightings that produce a spherical aperture rather than a cylindrical one.10 pages, LaTeX, 1 figure. Submitted to ApJLAstrophysicstext