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| Description: | Called the Dumbbell nebula because of its
visual appearance, this planetary nebula is the brightest in the sky.
The central star is a bright blue dwarf. North is up in this image.
The internal structure, including the apparent jets coming toward us at 10
PM and away from us at 4 PM, and the fainter outer shell, are visible in
this image. |
| Exposure Data: | 6/14-17/2007. LHaRGB: 20x10m, 14x20m,
5x10m,
8x10m, 8x10m, Ha binned 2x2. -15°C, 0.55 arc-sec./pixel. 11.5 hours total
exposure. |
Processing: |
Acquired via CCDAutoPilot and CCDSoft,
calibrated and combined in CCDStack, final processing in 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: | Seeing was mediocre at 2.7 arc-sec. for the
combined luminance data. |