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| Description: | M101 is a gorgeous face-on spiral galaxy about
24 million light years distant. |
| Exposure Data: | 5/9,10/2005. LRGB: 18x5m, 12x5m, 12x5m,
12x7m, RGB 2x2. -25°C, 0.55 arc-sec./pixel. |
Processing: |
Automatic acquisition, dithering, focusing via CCDAutoPilot2 and CCDSoft,
reduced and aligned, in Mira, LRGB combine in Maxim, L: 20 RRL in PixInsight, LLRGB combine, curves, levels,
Gredient Xterminator and other
processing in Photoshop. |
| Optical System: | 14.5” Ritchey-Chretien @ F/9 w/FFC, IMG6303E/CFW-7 CCD
camera, AstroDon filters, Paramount
ME, dithered 3 pixels, off-axis guided . |
| Comments: | Average seeing was 2.2 arc-sec. |