Herschel 400 Deep-Sky Objects
The Herschel 400 Catalog is a subset of the original Herschel (2,500 object) Catalog that contains 400 northern-sky galaxies, nebulae, and star clusters that can be found by amateur astronomers that want a challenge after finding the easier/brighter Messier Catalog and Caldwell Catalog objects. The Herschel 400 requires a bit larger telescope (6 inches and larger) than the Messier and Caldwell objects that can all be found in 4-6 inch scopes.
Herschel objects are designated by their NGC number rather than by a Herschel H number, unlike Messier and Caldwell objects that are designated by their M and C number.
- NGC/Her #
- NGC 2343 (H89)
- Christmas Tree Cluster