Dr. Jesus Rodrigo F. Torres
This Volume contains Urban Deep-Sky objects 51-90. There are 27 open clusters, 4 galaxies, 5 planetary nebulae, 3 bright nebulae, and 1 globular cluster catalogued. The number of open clusters may be attributed to the fact that many of the observations were made when the open cluster-rich constellations of Perseus and Cassiopeia are ideally situated in the sky for early evening observations. Most of the Caldwell Objects included in this Catalogue were observed in the previous months. It is unfortunate that just as soon as sky becomes clear and transparent in December, light pollution worsens.