Cave Nebula - diffuse nebula
Cave Nebula, is a diffuse nebula located in the constellation Cepheus .
Cave Nebula is magnitude 7.7 and is 50' x 30' in size. For reference, the full moon is 30' (arc minutes) or 0.5° in size.
* One can see up to magnitude 7-8 objects with perfect eyes under ideal dark sky conditions.