2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/13248The virial, projected and spherical Jeans equation galaxy mass estimators are compared. High-resolution models of elliptical galaxies from N-body simulations are used to compare predicted mass profiles. Averages over eight models and directions in the three intrinsic projections show that all the mass estimators are comparably poor for r<4 kpc but that, with the exception of the projected mass estimator, errors are within approximately 10 - 20% out to r=40 kpc. Because kinematic data for elliptical galaxies are now available out to several effective radii, mass estimation techniques which are simple to apply can provide mass profiles and mass-to-light ratios at large radii.3 pages, LaTeX, requires paspconf.sty, 1 PostScript figure, to appear in the proceedings of "Galaxy Dynamics", conference held at Rutgers, 08/98Astrophysicstext