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NGC 6781 (Planetary Nebula)
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Image Details:
- Camera: SBIG ST-2000XM
- Mount: Takahashi NJP
- Scope: Takahashi Mewlon 180
- Configuration: Prime Focus
- Additional Optics: n/a (Prime)
- Filter: Astrodon RGB I-Series Filters
- Effective Focal Length: 2160mm
- Effective Focal Ratio: f/12
- Exposure: L: 21 × 8min (1×1); RGB: 7 × 8min (1×1)
- Total Exposure: 5hrs, 36min
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- Date: 8/15/2007 9:21pm PDT (L), 9/4/2007 9:30pm PDT (RGB)
- Location: Saratoga, CA, USA
- Acquisition: CCDSoft
- Focus: CCDSoft
- Dithering: Manual
- Guiding: Self Guided
Processing:
- IRIS: Dark subtraction, registration, gradient removal li>JimP: Flat field, Kappa-Sigma Stacking, White balance, ASINH stretching
- CCDStack: R-L, LRGB combine
- Photoshop: scaling, JPG conversion
Image Description:
- This is NGC 6781, a planetary nebula n the constellation of Aquila. After a couple of false starts trying to figure out the new camera, scope, and mount, this one came in pretty well on a night of only average to below average seeing and transparency. A higher resolution image is available. North is up.