The Asimov Class is a commercial star liner built by and in use by the Federation. The first to vessels of this class to be built are the S.S. Asimov and the S.S. Callisto. The class registry numbers are Naval Construction Contract - Liner 230 through Naval Construction Contract - Liner 260

*sidenote: I based this design on the idea of the Asimov class commercial star liner from Babylon 5.
http://babylon5.wikia.com/wiki/Asimov_class