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NGC 2841 (Spiral Galaxy)
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Image Details:
- Camera: Canon Digital Rebel (300D)
- Mount: Celestron AS-GT
- Scope: Celestron C8-N (8" f/5 Newtonian)
- Configuration: Prime Focus
- Additional Optics: Celestron/Baader Multi Purpose Coma Corrector (MPCC)
- Filter: None
- Effective Focal Length: 1000mm
- Effective Focal Ratio: f/5
- Exposure: 26 x 5min @ ISO 400
- Total Exposure: 2hrs, 10min
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- Date: 4/11/2005 9:35:31 PM PDT (start)
- Location: Saratoga, CA, USA
- Acquisition: DSLRfocus
- Focus: DSLRFocus
- Dithering: Manual
- Guiding: GuideDog via Philips ToUcam Pro II (840k) through Orion ST80 w/ Celestron 2x "Kit" Barlow
Processing:
- IRIS: Dark subtraction, flat field, registration, gradient removal
- JimP: Kappa-Sigma Stacking, White balance, ASINH stretching
- Photoshop: Levels, cropping, JPG conversion
- Neat Image: Noise attenuation
Image Description:
This is NGC 2841, a spiral galaxy in the constellation of Ursa Major. This came out surprisingly well given the awful transparency, and considering that no less than 6 of the 26 frames had airplane trails in them! Amazingly, I was guiding on a double-star and it worked extremely well. Go figure. This is a crop of the full-size frame. North is up.