Observatory, Nantucket, Massachusetts
Twelve Stars in
VSF 193 in Sagittarius were studied. These objects were all long period
variables which have previously been studied, but which for various reasons
needed revising or updating.
Nine of the
variables have two or more published periods. By analysis of all previously
published available data, combined with estimates from our own plate
collection, I have been able to update these nine stars. In most cases I have
been able to make a definite choice between the alternate periods and to
improve upon the one chosen.