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NGC 6804 (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 LRGB I-Series Filters
- Effective Focal Length: 2160mm
- Effective Focal Ratio: f/12
- Exposure: L: 6 × 16min (1×1); RGB: 6 × 4min (3×3)
- Total Exposure: 2hrs, 48min
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- Date: 9/14/2007 9:27pm PDT
- Location: Saratoga, CA, USA
- Acquisition: CCDSoft
- Focus: CCDSoft
- Dithering: Manual
- Guiding: Self Guided
Processing:
- IRIS: Dark subtraction, registration, gradient removal
- JimP: Flat field, Kappa-Sigma Stacking, White balance, LRGB combine, ASINH stretching
- CCDSharp: Richardson-Lucy deconvolution
- Photoshop: Neil's Trick, cropping, JPG conversion
Image Description:
- This is NGC 6804, a planetary nebula n the constellation of Aquila. Had some tracking/focus/both problems in the acquisition of this image, but Neil Fleming's Star Trail Removal trick worked very well, after applying a generous dose of deconvolution in CCDSharp. This is an LRGB composite, with the Luminance binned 1×1 and the color data binned 3×3. A higher resolution image is also available. North is up.