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5.4. The FG-Systems

Table IV lists six galaxies whose spectra are of a somewhat later type than those in the F group, and so they are designated FG-systems.

In this group the central concentration of light tends to contribute a larger percentage of the total luminosity. Two of the galaxies, however, NGC 5633 and NGC 6574, are small and the direct-exposure evidence does not indicate definitely whether they are, in fact, similar to the larger systems.


NGC Hubble

4666 Sc
5005 Sb
5055 (M 63) Sb
5633 Sb
6574 Sb
7331 Sb