SaratogaSkies Jim Solomon's Astropics

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NGC 6992 (Network Nebula)

[Hα+R G B]

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: Celestron C8-N (8" f/5 Newtonian)
Configuration: Prime Focus
Additional Optics: Celestron/Baader Multi Purpose Coma Corrector (MPCC)
Filter: Hutech Hα Front Filter (HA-FF)
Effective Focal Length: 1000mm
Effective Focal Ratio: f/5
Exposure: 32 x 8min @ ISO 400 (RGB), 32 x 8min @ ISO 1600 (Hα)
Total Exposure: 8hrs, 32min
Date: 9/21/2006 (RGB); 9/22/2006 (Hα)
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, HαRGB combination, ASINH stretching
  • Photoshop: Levels, cropping, sharpening, JPG conversion
  • Neat Image: Noise reduction

Image Description:

This is NGC 6992, aka the Network Nebula and the Eastern portion of the Veil Nebula, a supernova remnant in the constellation of Cygnus. This image consists of 4+ hrs of RGB exposure and 4+ hrs of Hα exposure over two nights. See my recent NGC 6960 image for more details on processing. Also, for grins, check out my previous attempt. A higher-resolution image is also available. North is left.

 
Moon, Saturn, and The Twins
SaratogaSkies Jim Solomon's Astropics

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Moon, Saturn, and The Twins

[Hα+R G B]

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

Image Details:

Camera: Canon Digital Rebel (300D)
Mount: None
Scope: Canon EF 28mm - 80mm f/3.5 - f/5.6 IV USM lens
Configuration: Prime Focus
Additional Optics: n/a (Prime)
Filter: None
Effective Focal Length: 80mm
Effective Focal Ratio: f/5.6
Exposure: 8 x 1 sec @ ISO 100; 3 x 1/125 sec @ ISO 100
Date: 1/23/2005, 7:36pm PST
Location: Saratoga, CA, USA
Acquisition: Manual
Focus: Manual
Dithering: None
Guiding: None

Processing:

  • IRIS: RAW Conversion, Registration, Stacking
  • Photoshop: Compositing, Levels, Image Size

Image Description:

This is a widefield shot of a 98.33% full Moon near Castor (upper left), Pollux (lower left), and Saturn (lower-right). Castor and Pollux are the two brightest stars in the constellation of Gemini, The Twins. Mouse-over the image above to see annotations and to see the outline of the Gemini constellation. This is a composite of a stack of 1" exposures for the background stars and Saturn, and a stack of 1/125" exposures of the Moon. Compositing was done in Photoshop. Zenith is up (North is roughly in the direction of the line connecting the Moon to Castor).

 
NGC 2683 (Spiral Galaxy)
SaratogaSkies Jim Solomon's Astropics

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NGC 2683 (Spiral Galaxy)

[Hα+R G B]

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: 30 x 4min @ ISO 1600
Total Exposure: 2hrs, 0min
Date: 4/10/2005 9:50:00 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

Processing:

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

Image Description:

This is NGC 2683, an edge-on spiral galaxy in the constellation of Lynx. I got everything set up and ready to shoot and then the clouds moved in. Thankfully, the clouds parted at about 9:45pm and I had not given up yet. I'm glad I didn't. This is a crop of the full-size frame. North is up.

 
M101 (Pinwheel Galaxy)
SaratogaSkies Jim Solomon's Astropics

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M101 (Pinwheel Galaxy)   [obsolete]

[Hα+R G B]

Image Details:

Camera: Canon Digital Rebel (300D)
Mount: Celestron AS-GT
Scope: Celestron C8-N (8" f/5 Newtonian)
Configuration: Prime Focus
Additional Optics: n/a (Prime)
Filter: None
Effective Focal Length: 1000mm
Effective Focal Ratio: f/5
Exposure: 16 x 60sec @ ISO 400 + 16 x 60sec @ ISO 800
Total Exposure: 0hrs, 32min
Date: 5/13/2004 ~3am, and 5/19/2004 ~1:30am
Location: Saratoga, CA, USA
Acquisition: Manual
Focus: DSLRFocus
Dithering: None
Guiding: None

Processing:

  • IRIS: Dark subtraction, flat field, registration, and stacking
  • Photoshop: Noise reduction, color balance, crop (1/2 x), image scale (1/2 x), JPG conversion

Image Description:

My first attempt at M101, with too little exposure time and no guiding.

 
NGC 7380 (Emission Nebula)
SaratogaSkies Jim Solomon's Astropics

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NGC 7380 (Emission Nebula)

[Hα+R G B]

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: 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 8min @ ISO 800
Total Exposure: 2hrs, 56min
Date: 10/30/2005 9:39:07 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
  • Neat Image: Noise reduction

Image Description:

This is NGC 7380, a faint emission nebula in the constellation of Cepheus. This was the second night of "auto-dithering" with GADFly, an AutoIt script originally written by TG Tan and ported by me to work with the beta version of DSLRfocus. Works pretty well, but I need to fine tune the parameters a bit; specifically, the extent of the dithering was too small for this run, and there's some residual pattern noise because of this. A higher-resolution image is also available. North is up.