NGC 4380 (CS)
The dust spirals in this galaxy appear very flocculent. There are
spiral arm fragments throughout the circumnuclear region, yet they
continuously cross one another and reconnect.
March 15/16, 1980
If the spiral arms were removed from NGC 4380, the extensive
underlying disk would closely resemble the pronounced S0 galaxies
NGC 1553 and NGC 3056 (SO; panels 39, 53).
The arm fragments can be traced to within 5" of the center of
NGC 4380 where there is a smooth-textured, small central region
devoid of recent star formation.
Dust lanes are evident on the insides of the arm fragments, seen
best in silhouette against the disk on the near side, assumed to be
below the major axis in the print here.
The galaxy is in the Virgo Cluster region, midway between Virgo
subclusters A and B (Binggeli, Tammann and Sandage 1987). Its redshift
of v_o = 967 km/s is close to the mean velocity of Virgo Cluster
SA(rs)b:? (de Vaucouleurs)
Very small, bright nucleus. Very weak, filamentary arms and dark lanes.
Very poorly resolved. Classification doubtful.