SaratogaSkies Jim Solomon's Astropics


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IC 1284 (Emission + Reflection Nebula)

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: 24 x 4min @ ISO 800
Total Exposure: 1hrs, 36min
Date: 7/28/2005 11:01:46 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


  • IRIS: Dark subtraction, registration
  • JimP: Flat field, Kappa-Sigma Stacking, White balance, ASINH stretching
  • Photoshop: Levels, cropping, JPG conversion
  • Neat Image: Noise reduction

Image Description:

This is IC 1284, an Emission plus Reflection nebula in the constellation of Sagittarius. A modified camera would have done a better job of bringing out the red, Hα portion of the Emission nebula, but at the potential cost of masking the blue Reflection portion, at least in IC 1284. The other two Reflection Nebulae in the lower right are NGC 6589 and NGC 6590, respectively. Several Dark Nebulae (foreground dust which obscures our view of anything behind it) can be seen snaking their way through various portions of the image as well. This is the full frame, shrunk for display on the web. North is up.