Messier 17 - NGC 6618
Also known as the Swan nebula, Horseshoe nebula, Lobster nebula, or Checkmark nebula
Constellation: Sagittarius
The Swan Nebula
Messier 17 - NGC 6618
Also known as the Swan
nebula, Horseshoe nebula, Lobster nebula, or Checkmark nebula
Constellation: Sagittarius
| Image | NGC6618 20060528 |
| Field of View | 50' x 33' arc-minutes wide. |
| Telescope | 12-inch f/5 newtonian telescope on GEM. |
| Guiding | Hand guided with 4.5-inch f/18 guidescope. |
| Camera |
Canon EOS 300D Digital - Hα enabled. |
| Exposures | 16 x 2-minute exposures @ ISO 400 |
| Total Exposure time | 32 minutes |
| Filter/equipment |
Baader 2" Multi-Purpose Coma Corrector. Baader 2" UV/IR Cut Filter. |
| Processing | Dark
frame subtraction, bias and flat-fielded in Iris, processed and masked in Photoshop, Noiseware. |
| Exposure Date | 2006, May 28. |
(C) Copyright 2006 Paul Mayo.
paulm@skylab.com.au