SaratogaSkies Jim Solomon's Astropics


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NGC 6559 (Emission + 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: 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: 22 x 4min @ ISO 400
Total Exposure: 1hrs, 28min
Date: 8/6/2005 10:08:48 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

Image Description:

This is another Team Saratoga™ image, using Rich's modified 300D and my C8-NGT. This is a stunning region of emission and reflection nebulae in the constellation of Sagittarius. The object labels above are borrowed from Jerry Lodriguss' excellent, annotated image. (The catalogs I generally use for annotations had conflicting information about the various nebulae in this region, so I just used Jerry's data.) This is the full frame, shrunk for display on the web. A full-resolution image is also availble. North is left.