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NGC 6946 (Spiral Galaxy)
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| Mouse-over to see annotations. (Requires Javascript) Click to see high-res version. |
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: 30 x 4min @ ISO 800
- Total Exposure: 2hrs, 0min
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- Date: 9/16/2004, ~11:10pm 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, normalized Kappa-Sigma stacking, background fit, cropping
- Photoshop: Levels, image size, JPG conversion
Image Description:
In the lower left is NGC 6946, a spiral galaxy that straddles the border between the constellations of Cygnus and Cepheus. In the upper right is NGC 6939, an open cluster in Cepheus. This is two full hours of total exposure time and is one of my best images to date. This is the full frame, scaled for display on the web. A full-resolution image is also available. North is up.
NEWSFLASH!! Supernova 2004et occurred less than 6 days after this image was taken! Mouse-over the image below to see the supernova discovery image. Note how there's absolutely no sign of that star in my image, yet six days later it's as bright as some stars in our own galaxy!
