This research has made use of the SIMBAD database, operated at CDS,
Strasbourg, France, and of the APS Catalog of the POSS I which is
supported by the National Science Foundation, the National Aeronautics
and Space Administration, and the University of Minnesota. The APS
databases can be accessed at http://isis.spa.umn.edu .
© European Southern Observatory (ESO) 1997
Online publication: April 28, 1998