Amazon.com description: Product Description: This is a standard reference work for telescope users which gives positional and other data for galaxies, double and variable stars, and star clusters. This companion to Volume One includes comprehensive tables on 20,000 objects. Comprehensive treatment is given for each object: position for epoch 2000.0, magnitudes in the UBV photometric system; color index; surface brightness and Hubble classification for galaxies; and many other characteristics. This is a re-issue of a book first published in 1985 which has been out-of-print for several years. It has been made available again in response to many requests from users of Sky Catalogue 2000.0 Volume 1.