NED object is NGC 1300; Reference is 1980ApJ...242..913P Fig. 3. - A comparison of the stellar rotation curve (P.A. 103deg, solid line from Fig. 2) with that of the ionized gas (P.A. 95deg, open circles and squares). The line of nodes of the galaxy is approximately 100deg; thus, geometrical projection effects are essentially the same for the two sets of data.