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

Processing:

  • 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.

 
M8 (Lagoon Nebula)
SaratogaSkies Jim Solomon's Astropics

Search

Latest news

December: Test shots with new scopes/mounts

Dec 21: TMB 80/480 Arrives!

Dec 3: AP1200 Arrives!

Nov 30: TMB 152/1200 Arrives!

Links:

M8 (Lagoon Nebula)   [obsolete]

Image Details:

Camera: Canon Digital Rebel (300D)
Mount: Celestron AS-GT
Scope: Celestron C8-N (8" f/5 Newtonian)
Configuration: Prime Focus
Additional Optics: n/a (Prime)
Filter: None
Effective Focal Length: 1000mm
Effective Focal Ratio: f/5
Exposure: 30 x 1min @ ISO 800
Total Exposure: 0hrs, 30min
Date: 6/22/2004, 1:51am PDT (start)
Location: Saratoga, CA, USA
Acquisition: Manual
Focus: DSLRFocus
Dithering: None
Guiding: None

Processing:

  • IRIS: Dark subtraction, flat frame, registration, and stacking
  • Photoshop: Noise reduction, image scale (1/4x), JPG conversion

Image Description:

The "summer" Milky Way -- summer, that is, in the Northern Hemisphere -- is a glorious site to behold, especially with an 8" pupil and a 30min integration time! This is the Lagoon Nebula (aka Hour Glass Nebula), a stunningly beautiful emission nebula in the constellation of Sagittarius. The collection of bright, white stars just left of center is the Open Cluster NGC 6530. The seeing and transparency were only average the morning this was shot. I can only imagine how this would have turned out on a night of exceptional seeing and transparency. North is up.