SaratogaSkies Jim Solomon's Astropics


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NGC 6543 (Cat's Eye Nebula)

Image Details:

Camera: Canon Digital Rebel (300D)
Mount: Celestron AS-GT
Scope: Celestron C8-N (8" f/5 Newtonian)
Configuration: Negative Projection (Barlowed)
Additional Optics: TeleVue 2x Barlow
Filter: None
Effective Focal Length: 2844mm
Effective Focal Ratio: f/14.2
Exposure: 30 x 30sec @ ISO 1600
Total Exposure: 0hrs, 15min
Date: 8/5/2004, 11:30pm PDT
Location: Saratoga, CA, USA
Acquisition: DSLRfocus
Focus: DSLRFocus
Dithering: None
Guiding: None


  • IRIS: Dark subtraction, flat field, registration, Kappa-Sigma stacking, Richardson-Lucy deconvolution
  • Photoshop: Cropping, JPG conversion

Image Description:

NGC 6543 is a planetary nebula in the constellation of Draco. I used 10 iterations of Richardson-Lucy deconvolution to bring out the structure in the nebula. I was very careful at every step of the aquisition and processing chain not to clip any of the nebula or its central star, in order to preserve the color and appearance of the nebula. I'm surprised this one came out as well as it did, since the object was in a fairly light-polluted portion of the sky. This is a crop of the full-size image. North is up.