NGC 4477 has a very well-defined bar which is imbedded within an extensive lens-like envelope. It has a fairly sharp edge and is slightly enhanced near the rim, and is classified as a ring-like feature. Surrounding the ring, two broad, diffuse incomplete arcs appear to bracket the galaxy around the bar. It is suggested that NGC 4477 has a highly evolved double ring morphology. Also, both ring features are exceedingly washed out.[3]
^HO, LUIS C.; SARZI, MARC; RIX, HANS-WALTER; SHIELDS, JOSEPH C.; RUDNICK, GREG; FILIPPENKO, ALEXEI V.; BARTH, AARON J. (30 October 2001). "An Efficient Strategy to Select Targets for Gasdynamical Measurements of Black Hole Masses Using the Hubble Space Telescope". Publications of the Astronomical Society of the Pacific. 114 (792): 137–143. arXiv:astro-ph/0110671. doi:10.1086/338546. S2CID17982236.