CSOG 2.2

The third revision in four years. Double the number of editions, for a total of 40. New ones such as Abell Planetary Nebulae, Deep Sky Objects in Burnham’s Celestial Handbook, Rose Compact Groups of Galaxies, Named Objects, Collinder Star Clusters and many more. Countless changes, corrections and enhancements. Lots of new content. New XL editions for Messier, Lacaille, Abell, Palomar, Terzan, Bennett and Caldwell. More labeled images. It is the biggest update since CSOG was first published.

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New editions in CSOG 2.2 are marked with an asterisk*

Constellation Editions by telescope aperture

  • 5-6"
  • 8-10"
  • 12"

Catalogs & Lists

  • Messier
  • Lacaille
  • Dunlop
  • Herschel
  • Herschel 400
  • Herschel II
  • Caldwell
  • Bennett

Galaxy Editions

  • Arp Peculiar Galaxies
  • Hickson Compact Galaxy Groups
  • Rose Compact Groups of Galaxies*
  • Holmberg Galaxies

Star Cluster Editions

  • Berkeley Star Clusters*
  • Collinder Star Clusters*
  • Dolidze Open Clusters
  • Dolidze-Dzimselejsvili Open Clusters
  • Haffner Open Clusters*
  • Harvard Open Clusters*
  • Hogg Open Clusters*
  • King Open Clusters*
  • Lynga Star Clusters*
  • Melotte Star Clusters*
  • Palomar Globular Clusters
  • Pfleiderer Star Clusters*
  • Pismis Star Clusters*
  • Roslund Open Clusters*
  • Ruprecht Star Clusters*
  • Stock Open Clusters
  • Terzan Globular Clusters
  • Tombaugh Open Clusters*
  • Trumpler Open Clusters*
  • Van den Bergh-Hagen Star Clusters*

Observing Programs

  • Astronomical Society of Southern Africa (ASSA) Top-100


  • Abell Planetary Nebulae*
  • Burnham’s Celestial Handbook – Deep Sky Objects*
  • Czernik Objects*
  • Named Objects*

CSOG may not be for you if…

Truth be told, CSOG is not for everyone. It may be too steep a learning curve if you have yet to master the very basics of astronomy and lack familiarity with your equipment. CSOG may not be for you if…

  • you believe tablets can not be used effectively for visual astronomy, filtered and properly dimmed to ensure optimum night vision
  • you are unable to determine the field of view of your eyepiece and can not determine cardinal directions
  • reading a starchart proves troublesome and you perhaps believe R.A. and Dec. are terms used by stockbrokers
  • you are unable to point your telescope to within a degree of any position
  • you prefer printed books with endless lists and tables, filled with object names and plain text, sorted only in right ascension
  • if you believe CSOG is just a collection of DSS images
  • you do not like to to use large files just because they are large
  • if you believe "you have seen it all" after completing the Messiers and part of the Herschel 400
  • you believe CSOG is for GOTO telescopes only
  • … you can’t find the tip jar!

That being said, I hope you enjoy this free publication and all its editions! Click here for the download page.