Astrophysics (Index)About

Caldwell Catalog

(small catalog for amateur astronomers as an adjunct to the Messier Catalog)

The Caldwell Catalog was assembled in the 1990s with 109 diffuse objects that are not in the Messier Catalog but are just as easily viewed by amateur astronomers. Amateur astronomers use the Messier Catalog as a list of bright, easily-seen galaxies, globular clusters and nebulae for potential viewing, but Messier's actual goal was to list those that could be confused with comets, skipping some easily-seen diffuse objects that were unlikely to be mistaken for comets.

Further reading:
CaldwellCaldwell 77 

Referenced by pages:
IC 342
NGC 3201