The Cave Nebula also known by several other catalog names is a diffuse nebula in the constellation Cepheus. This is relatively faint, and only visible to larger telescopes (or astro photography). It lies about 2400 light-years away. The Cave Nebula contains emission, reflection, and dark nebulosity making it an interesting target for astrophotography. It gets its name from the dark lane on the eastern side very near the bright curvature of emission nebulosity, giving it the appearance of a deep cave when viewing through a telescope.
This is a stacking of 45 x 300 second images (225 minutes) taken mid December.