Cometary Globule
CG4
This
super faint nebula called CG4 is known as a cometary globule - one of very few
such objects. In this image CG4 spans almost 1.5° of the night sky. The galaxy
at top-left is NGC2427 and the tiny galaxy at mouth of the globule (centre-top)
is ESO 257-19.
| Image | The Norma Nebula NGC6288 and NGC6164-5 |
| Catalog | 20080411 |
| Telescope |
William Optics 110mm f/4.7 APO Refractor telescope on observatory mounted Losmandy G-11 equatorial mount with Gemini 4. |
| Guiding | Autoguided with SBIG 402 on Orion ST-80 f/5 guidescope with CCDOps. |
| Camera |
Central DS Cooled Canon EOS 350D Digital. |
| Exposures | 11 x 8-minute exposures @ ISO 800. |
| Total Exposure time | 88-minutes. |
| Filter/equipment |
Astronomik 2" CLS filter, WO 0.8x Field reducer/corrector Mk III. |
| Processing |
Darks, bias and flat-fielded with ImagesPlus, post processing in Photoshop. |
| Notes | Focused with DSLR Focus. FOV is 145' x 96' = 2.25° x 1.5° |
(C) Copyright 2008 Paul Mayo.
paulm@skylab.com.au