SH2-166 (Sharpless 166 ) This small and dim object might be a good target for larger telescope imaging systems. The nebula picks up well in hydrogen-Alpha. There is nebula area Sh2-166 that wide field systems can pick up but it is very faint. Give enough exposure time, this is a nice object for large fast optical systems. For a complete list of the Sharpless Catalog visit my main site at http://www.sharplesscatalog.com