Caldwell object C21 is a irregular galaxy located within the constellation Canes Venatici.
Caldwell C21 is best viewed during Spring, is magnitude 9.4*, and can be viewed with large binoculars. It is 5 x 3° in size. For reference, the full moon is 30' (arc minutes) in size.
- irregular galaxy
- Canes Venatici
- large binoculars
- 5 x 3'
- 12 28.2
- +44 06'
* The naked eye can see up to magnitude 8 objects under ideal dark sky conditions.
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