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NGC 6888, The Crescent Nebula
in Hydrogen - alpha light
This grayscale image shows the fine internal structure of the Crescent Nebula. The color image using this image for the luminance layer is here.
| Date |
2003 August 24 |
| Scope |
RCOS Ritchey-Chretien 12.5 inch at f4.5 on AP 1200GTO mount, guided with ST-4 on guidescope. Camera: SBIG ST-10XME at -15 °C and CFW-8a color wheel, controlled with MaxIm DL/CCD. |
| Exposure |
Luminance = H-alpha 3 x 20 min + 6 x 10 min, 3 nM filter. |
| Processing |
Frames calibrated and combined in MaxIm and debloomed with the CCD-NewAstro Debloomer. The Ha-luminance layer was subjected to DDP processing in MaxIm. Final processing with Levels and Curves in Photoshop. |