| Cocoon Nebula | |
|---|---|
| R.A. | 21h 53m 41.423s (2000.0) |
| Dec. | 47deg; 17' 18.90" (2000.0) |
| Apparent Size | 12' x 12' |
| Radial Velocity | N/A |
| Magnitude | [open cluster +7.2],[nebula +10] |
| Distance | [Open Cluster IC 5146 852 pc ] |
| Group of Galaxies | Within Milky Way |
| Other IDs | Cocoon Nebula IC 5146,C19 |
A very faint object ,The Cocoon Nebula is made up of the open cluster IC5146 and surrounded by nebulosity of mostly Hydrogen gas. The nebula is located at the end of a long dark nebule B168. The cluster is made up of mostly 12th magnitude stars. The Cocoon Nebula lies at the end of an interesting dark nebulae, B 168 in Cygnus. The nebula, which includes reflection and emission nebulosity and is bisected by a dark lane of dust. The cluster is not very rich, containing only about 20 stars, the brightest of which is about magnitude 9.6.at the center of the cluster and nebula.
The dark nebula B 168, however, is easily visible in binoculars and is a fascinating object amidst the rich Cygnus star fields, about 3 degrees east-southeast of open cluster M39
| Scope | 8" MN-86 Intes Micro with 0.5 focal reducer |
| Mount | EQ6 unguided |
| Exposure | 49 mins, 148 x 20 sec subframes |
| Post-processing | AA3, Dark framed,gradient removed, mild unsharp masking in AA3. |
| Filters | TT IR |
| Camera | Starlight Express hx516 with ICX424AL chip< |
| Location | Claines |
| Date | 17th July 2005 |
As with m101, this is a calibration shot, and requires re-imaging correctly with full guided subframes ( which I will
do when skyscan arrives in the post :-)
| Scope | 5" MN-56 Intes Micro with 0.5 focal reducer |
| Mount | EQ6 unguided |
| Exposure | 37 x 1 min subframes |
| Post-processing | AA3,gradient removed,ddp, mild unsharp masking in AA3. |
| Filters | TT IR |
| Camera | Starlight Express hx516 with with ICX424AL chip |
| Location | Claines |
| Date | 9th August 2005 |
A wider field shot of the cocoon nebula.