NGC 4591 is an Sb galaxy that is not visibly disturbed in the optical. There are
no cataloged galaxies at a comparable optical redshift within 15^'^ of the
galaxy. At a spatial resolution of ~20 kpc, the H I disk of NGC 4591 appears to
be symmetric both spatially and kinematically with no evidence for
perturbations. The same also is true at a spatial resolution of ~10 kpc (Fig.