SaratogaSkies Jim Solomon's Astropics


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IC 4592 (Reflection Nebula)

Mouse-over to see annotations. (Requires Javascript) Click to see high-res version.

Image Details:

Camera: Mofidied Canon Digital Rebel (300D): Hutech (no filter)
Mount: Celestron AS-GT
Scope: Canon EF 200mm f/2.8L II USM lens
Configuration: Prime Focus
Additional Optics: n/a (Prime)
Filter: None
Effective Focal Length: 200mm
Effective Focal Ratio: f/2.8
Exposure: 30 x 4min @ ISO 400
Total Exposure: 2hrs, 0min
Date: 6/29/2005 10:00:38 PM PDT
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


  • IRIS: Dark subtraction, registration, gradient removal
  • JimP: Flat field, Kappa-Sigma Stacking, White balance, ASINH stretching
  • Photoshop: Levels, image scale, cropping, JPG conversion

Image Description:

This is a Team Saratoga™ image <grin>, using Rich's Modified 300D and my 200mm lens. The large reflection nebula in the middle-right portion of the image is IC 4592 in the constellation of Scorpius, which surrounds the bright star ν Scorpii. Mouse-over the above image to see further annotations. This is the full frame shrunk for display on the web. A higher-resolution image is also available. North is right.