SaratogaSkies Jim Solomon's Astropics


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Milky Way (Summer Triangle)

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

Image Details:

Camera: Mofidied Canon Rebel XT (350D): Hutech Type I Filter Replacement
Mount: Celestron AS-GT
Scope: Canon EF 14mm f/2.8L USM lens
Configuration: Prime Focus
Additional Optics: n/a (Prime)
Filter: None
Effective Focal Length: 14mm
Effective Focal Ratio: f/2.8
Exposure: 35 x 4min @ ISO 200
Total Exposure: 2hrs, 20min
Date: 7/31/2006 11:00:06 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, gradient removal
  • JimP: Flat field, Kappa-Sigma Stacking, White balance, ASINH stretching
  • Photoshop: Levels, cropping, JPG conversion
  • PTAssembler: Panorama creation

Image Description:

This is the second in my series of ultra-widefield images of the Milky Way. This is the so-called “next frame to the left” from the shot of the Milky Way core. This one is centered, almost, on the “Summer Triangle”, formed by the bright stars Altair, Vega, and Deneb.

For more information about this image, check out my Milky Way (Core) image which was taken with the same 14mm lens. This one, however, was taken from my house in Saratoga, CA, and there was no need to mask out the horizon when stacking the frames. Also check out the panorama containing these two images

Mouse over the image to see constellation outlines and some other annotations. The image is oriented along the galactic plane, which is to say, the Milky Way's North Galactic Pole is up. Earth's North is inclined at roughly 27° with respect to the galactic plane (63° with respect to the North Galactic Pole), as can be seen by the direction arrows in the mouse-over. A higher resolution image is also available.