De Vaucouleurs Atlas Type: SA(rs)ab
Telescope: Perkins 1.8-m
North left , East down
Field Dimensions: 2.6 x 1.9 arcminutes
RC3 Type: SAB(rs)a pec
RSA Type: Sc(s)/Sa
Surface Brightness Range Displayed: 20.0-25.5 mag per square arcsec
Absolute Blue Magnitude: -19.5
Elmegreen Spiral Arm Class: AC12
De Vaucouleurs Atlas Description:
An interesting example of a nonbarred ringed galaxy, one which is a member of the Virgo Cluster . The inner pseudoring is very well-defined and patchy for the type; it is made of two tightly wrapped spiral arms. Three very diffuse spiral arms, defined partly by dust, break from this feature. We adopt a type of Sab to allow for the patchy inner ring, the smooth outer arms, and the significant bulge.
Koopmann and Kenney (2004) classify NGC 4580 as a severely ``truncated" spiral galaxy, meaning its star-forming disk ends abruptly. They argue that NGC 4580 is a victim of ram-pressure stripping.