The Cave Nebula (Sh2-155) is a faint but large region of double ionized hydrogen, surrounded by dust, that lies in the constellation Cepheus. The area is rich in detail and very colorful, due to the red emission from ionized hydrogen and the blue of reflection nebulae. The area is populated by many dark nebulae, some very prominent and detailed. One of these is the central "cave-like" structure (APOD).

Imaging Data

Date: 10-9-2010

Location : Sudbury, Massachusetts

Optics : William Optics ZenithStar 66 Semi Apo Refractor

Filter(s) : Astronomik CLS-CCD

Mount : PiggyBack Meade LX-200 on ATS Pier

Autoguiding : None

Camera : Canon EOS 1000D Astro-modified

Exposure info : 13 x 300 second Exposures @ISO 1600

Total Exposure : 65 minutes