SaratogaSkies Jim Solomon's Astropics

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December: Test shots with new scopes/mounts

Dec 21: TMB 80/480 Arrives!

Dec 3: AP1200 Arrives!

Nov 30: TMB 152/1200 Arrives!

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Moon and Venus

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: Orion ED80 (80mm f/7.5 APO Refractor)
Configuration: Negative Projection (Barlowed)
Additional Optics: William Optics 2" APO 0.8x Reducer/Field Flattener
Filter: None
Effective Focal Length: 480mm
Effective Focal Ratio: f/6
Exposure: 62 x 1/1000s @ ISO 100 (Still); 106 x [ibid.] (Animation)
Total Exposure: 0hrs, 0min
Date: 5/19/2007 8:11:11 PM PDT (Start)
Location: Saratoga, CA, USA
Acquisition: DSLRfocus
Focus: DSLRFocus
Dithering: None
Guiding: GuideDog via Philips ToUcam Pro II (840k) through Orion ST80 w/ Celestron 2x "Kit" Barlow

Processing:

  • IRIS: Dark subtraction, Registration, Stacking, White Balance, Gamma stretch
  • JimP: Flat field, Pattern-noise removal
  • Photoshop: Sharpening, levels, cropping, JPG conversion
  • Mencoder: AVI creation

Image Description:

This is a conjunction of the Moon and Venus, separated by a degree or so during twilight on the night of May 19, 2007. The above (still) image is a stack of 62 exposures.

Far more interesting are the following animations, each consisting of 106 exposures:

A higher resolution image is also available. Zenith is up (north can be seen by mousing-over the image).

 
NGC 2264 (Cone Nebula/Xmas Tree Cluster)
SaratogaSkies Jim Solomon's Astropics

Search

Latest news

December: Test shots with new scopes/mounts

Dec 21: TMB 80/480 Arrives!

Dec 3: AP1200 Arrives!

Nov 30: TMB 152/1200 Arrives!

Links:

NGC 2264 (Cone Nebula/Xmas Tree Cluster)

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: Orion ED80 (80mm f/7.5 APO Refractor)
Configuration: Focal Reduced
Additional Optics: William Optics 2" APO 0.8x Reducer/Field Flattener
Filter: None
Effective Focal Length: 480mm
Effective Focal Ratio: f/6
Exposure: 32 x 8min @ ISO 1600
Total Exposure: 4hrs, 16min
Date: 2/23/2006 7:40:35 PM PST (start)
Location: Saratoga, CA, USA
Acquisition: DSLRfocus
Focus: DSLRFocus
Dithering: GADFly 1.0.5
Guiding: GuideDog via Philips ToUcam Pro II (840k) through Orion ST80 w/ Celestron 2x "Kit" Barlow

Processing:

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

Image Description:

This is NGC 2264, aka, the Cone Nebula and Christmas Tree Cluster in the constellation of Monoceros. The Christmas Tree Cluster is upside down, and its outline can be seen by mousing-over the image above. (Javascript must be enabled to see the effect.) The Cone Nebula (LDN 1613) is actually the Dark Nebula superimposed on the background emission nebula.

This is another extremely faint nebula, which 4+ hours of exposure barely brings out - at least under light polluted skies. I again used longer exposures (8min) and higher ISO (1600) in order to better resolve the nebula.

A higher-resolution image is also available. North is up.