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| Description: | M101 is a gorgeous face-on spiral galaxy about
24 million light years distant. |
| Exposure Data: | 5/24-6/10, 2007. LRGBHa: 36x10m, 14x10m, 14x10m,
14x10m, 12x20m, RGBHa 2x2. -15°C, 0.55 arc-sec./pixel. |
Processing: |
Acquired via CCDAutoPilot and CCDSoft,
calibrated in CCDStack, color combine in MaximDL, final processing in
PixInsight and PS CS3. |
| Optical System: | 14.5” Ritchey-Chretien @ F/9 w/FFC,
Apogee Alta U16M/FLI CFW-7 CCD
camera, AstroDon filters, Paramount
ME, dithered 3 pixels, off-axis guided with SBIG ST-402ME. |
| Comments: | 17 hours total exposure. Color
correction and Ha blending using Chris Schur's
methods from AIC 2006. |