1. Guide Star Catalog II ID: ivo://archive.stsci.edu/gsc23skynode Title: Guide Star Catalog II Short Name: GSC2 Date: 17 Feb 2014 21:41:36 Publisher: STScI Description: The Guide Star Catalog 2 (GSC2) is an all sky multi-wavelength, multi-epoch object catalog based on 1 arcsec resolution scans of photographic sky survey plates from the Palomar and UK Schmidt Telescopes.