SaratogaSkies Jim Solomon's Astropics


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M33 (Triangulum Galaxy)

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: 19 x 5min @ ISO 400
Total Exposure: 1hrs, 35min
Date: 11/13/2004, ~10:30pm PST (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, flat field, registration, normalized Kappa-Sigma stacking, background fit, cropping
  • Photoshop: Levels, image size, cropping, JPG conversion

Image Description:

This was the first decent night of weather we've had here in the Bay Area in a long time, so it was nice to get out again and capture this image. The seeing and transparency were good, not great, but far better than they've been in quite some time. M33 is a spiral galaxy, sometimes referred to as the Pinwheel Galaxy, in the constellation of Triangulum -- a constellation which is shaped like ... drum roll please ... a triangle. <grin> This is a crop of the full-size frame. North is to the left.