NGC 4698 - (R)SA(r)a

NGC 4698

De Vaucouleurs Atlas Type: (R)SA(r)a

Filter: B

Telescope: OHP 1.2-m
North right , East up
Field Dimensions: 9.7 x 7.3 arcminutes

RC3 Type: SA(s)ab
RSA Type: Sa
Surface Brightness Range Displayed: 17.9-26.0 mag per square arcsec
Absolute Blue Magnitude: -19.9
Elmegreen Spiral Arm Class: AC 3

De Vaucouleurs Atlas Description:

This strongly bulge-dominated galaxy is a very good example of a nonbarred double-ringed system. The inner ring is a well-defined and mostly closed feature. At its inner edge, there may also be a dust ring . The outer ring is more than three times larger than the inner ring ; it is also well-defined but very faint, which may explain why it is not recognized in the RC3 classification. The bulge is very significant and appears to be largely spherical in shape. The west side shows near-side extinction.

Koopmann and Kenney (2004) classify NGC 4698 as an ``anemic" spiral because of its very low normalized star formation rate compared to median properties of samples of Virgo Cluster galaxies.