| Abstract | The paper reports the discovery of a large spiral galaxy at low galactic latitude close to the supergalactic plane in the constellation Circinus. Properties determined or estimated for this galaxy include its radial velocity, interstellar extinction, intrinsic face-on colors, surface brightness distribution, radio luminosity, neutral hydrogen distribution, hydrogen diameter and mass, velocity field, rotation curve, total mass, M/L ratio, and 'indicative' mass. A distance of about 4.2 Mpc is obtained from six independent estimates. The results indicate that this galaxy is either an overly hydrogen-rich Sd (or later-type) object with a unique red nucleus and a strong absorption lane across the bulge or an Sb object with an anomalously small nucleus, a large turnover radius, and about nine times the normal amount of hydrogen. It is concluded that this galaxy is not normal and is not a member of the Local Group. |
