The telescope aperture classes for the constellation editions are a rule of thumb. If, for example, you have an 8" or larger telescope but observing conditions are less than optimal, you may want to use the 5-6" edition instead. If you have a 5-6" scope and like a challenge, use the 8-10" edition.
Click the Index button to download only an edition's index pdf, click the Planfile & Tours button to download only the AstroPlanner planfile(s) and tours. Use the green download button(s) to download a complete edition in the image orientation of your choice. Please read Downloading CSOG and iPad Astronomy.
5-6" - 8-10" - 12-14"
5-6" Telescopes
2348 Objects within reach of telescopes of 5 to 6 inches in aperture.
All objects in the Messier, Dunlop and Lacaille catalogs are included.
228 carbon stars
751 open clusters
161 globular clusters
199 nebulae
139 dark nebulae
105 planetary nebulae
10 supernova remnants
693 galaxies and galaxy groups
65 asterisms
4 other
Downloads
- 1 of 2: Andromeda through Lacerta (+ index)
- 2 of 2: Leo through Vulpecula
Click here to review the CSOG image orientations
Unmirrored
MH
MV
MHV
8-10" Telescopes
4473 Objects within reach of telescopes of 8 to 10 inches in aperture.
All objects in the 5-6" edition are included, along with all objects in the Herschel 400, Herschel II and Herschel 3 lists and all but the faintest deepsky objects in Burnham's Celestial Handbook.
349 carbon stars
1369 open clusters
193 globular clusters
288 nebulae
169 dark nebulae
187 planetary nebulae
17 supernova remnants
1782 galaxies and galaxy groups
91 asterisms
28 other
Downloads
- 1 of 3: Andromeda through Cygnus (+ index)
- 2 of 3: Delphinus through Pavo
- 3 of 3: Pegasus through Vulpecula
Click here to review the CSOG image orientations
Unmirrored
MH
MV
MHV
12-14" Telescopes
14531 Objects within reach of telescopes of 12 to 14 inches in aperture.
All objects in the 8-10" edition are included, along with all Herschel objects.
865 carbon stars
3665 open clusters (1562 excluding the constellations of Dorado & Mensa)
230 globular clusters
524 nebulae
175 dark nebulae
483 planetary nebulae
36 supernova remnants
8370 galaxies and galaxy groups
114 asterisms
69 other
Downloads
- 1 of 6: Andromeda through Carina (+ index)
- 2 of 6: Cassiopeia through Cygnus
- 3 of 6: Delphinus through Hercules
- 4 of 6: Horologium through Ophiuchus
- 5 of 6: Orion through Scutum
- 6 of 6: Serpens through Vulpecula
Click here to review the CSOG image orientations