April 1/2, 1981
103aO + GG385
The sense of the spiral pattern in NGC 4129
can be determined from the two low-surface-brightness
outer arms, one on each side of the center.
The redshift is v_o = 994 km/s.
P.A.S.P., 86, 516, 1974.
Bright complex bar and lens with dark markings. Very faint arms.
Heidelberg Veroff. Vol. 9, 1926 and Lund 9 dimensions are for the bright part
Yerkes 2 classification: or I?
According to vB - SD?.