Archive for November 2011

Jupiter November 28, 2011   Leave a comment

ETX-125 f/15 at prime focus.  Scorpion monochrome camera, best 8 of 784 frames.

Ibot color camera 640 x 480 8-bit. (New old stock, firewire camera for $20 on ebay.)  Best 30 of 992 frames stacked.  A bit of the Great Red Spot visible.

Same stack as the top image, but unsharp masked three times in Photoshop to bring out the banding.

Posted November 28, 2011 by finkh in Uncategorized

Imbrium basin   Leave a comment

Sinus Iridum, Imbrium Basin, Appenine Mountains.

Posted November 20, 2011 by finkh in Uncategorized

F/38 Copernicus   Leave a comment

Copernicus imaged at f/38.  Even 30 of 806 (90%) frames turned out pretty soft, so the sharpening is pushed.  November 5, 2011, about 10:30pm.

9 of 806 frames (94%).  Also a little oversharpened.

Posted November 15, 2011 by finkh in Uncategorized

Plato, Valles Alpes, the Appenines   Leave a comment

November 5, 2011.  19 frames out of 458.

Posted November 14, 2011 by finkh in Uncategorized

Io in Transit   1 comment


Io in transit over Jupiter 9:30pm November 5, 2011.  Last image properly aligned, Europa to the west.  Io’s shadow is centered on the Great Red Spot.

Top image settings:

CI Cutoff: 60
Aligned Using: Luma Channel
Gross Alignment: Planetary
Pixel Alignment: Horizontal and Vertical Separate
Pixel Alignment Block Size: 32 x 32 pixels
Pixel Matching Tolerance :  7.00
Scale Frames by: 1 x
Frame Sharpening: Light
Gaussian Blur sharpness and alignment frames: On
Sharpen alignment frames: On
Auto Histogram Expand alignment frames: Off
HighQuality Bayer:Off
Auto Clip Area: On
Adjust Pixel Comparison Area Brightness: Off
Spatial Sharpness Distance: Medium
Remove Hot & Cold Pixels: Off
Binning Frames 2×2: Off
Averaging Images
Subtracting Background: Off
Gradient Leveling: Off
Sharpness Statistics: Min 1.797764 , Max 3.714247 , STD0.226313 , Mean 3.258496 , Median 3.302502 , Mode 3.235126, CutOff  Value 3.384226
Pixel Matching Value:  7.00

Main Image Centroid   X:553.1, Y:654.4
Pixel Area One Centroid  X:595.1, Y:642.4
Pixel Area Two Centroid  X:544.1, Y:611.4
Stacked 99 out of 334 frames

Second image settings:

—-Processing Movie: 20111105_213309_L.mov 1 of 1
Stacking : 16 Bit Movie
CI Cutoff: 80
Aligned Using: Luma Channel
Gross Alignment: Planetary
Pixel Alignment: Horizontal and Vertical Separate
Pixel Alignment Block Size: 96 x 96 pixels
Pixel Matching Tolerance :  5.00
Scale Frames by: 2 x
Frame Sharpening: Light with Noise Reduction
Gaussian Blur sharpness and alignment frames: Off
Sharpen alignment frames: On
Auto Histogram Expand alignment frames: Off
HighQuality Bayer:Off
Auto Clip Area: On
Adjust Pixel Comparison Area Brightness: Off
Spatial Sharpness Distance: Medium
Remove Hot & Cold Pixels: Off
Binning Frames 2×2: Off
Averaging Images
Subtracting Background: Off
Gradient Leveling: Off
Sharpness Statistics: Min 1.802817 , Max 3.480796 , STD0.202311 , Mean 3.070980 , Median 3.087520 , Mode 3.087520, CutOff  Value 3.359611
Pixel Matching Value:  5.00

Main Image Centroid   X:1108.6, Y:1290.6
Pixel Area One Centroid  X:1194.6, Y:1261.6
Pixel Area Two Centroid  X:1154.6, Y:1210.6
Stacked 19 out of 334 frames

The upper image got pretty soft, so I ended up sharpening it in Photoshop, oversharpened, which is a habit hard to break.  On the second image, I reduced the unsharp mask in Photoshop to 50%.  The moons and the shadow ended up much rounder.  In the third image I stayed in Astro IIDC and adjusted the sharpness and tonal range with the image controls.  No further sharpening.  Here is the Image Controls window for the third image:

The second image had curves at .85 and cutoff zero.   All other settings were the same.  Below is for image 4.

Turning noise reduction and saturation off sharpened the image.  Lowering the curve brightened it up.

Posted November 7, 2011 by finkh in Uncategorized

Clavius and Tycho   1 comment

This is a 5 megapixel image from a 1.4 megapixel camera.  The camera pixels are 2x.  Click for full-size.  You can count the terraces in Tycho, and lose count of the craters in Clavius.   Astro IIDC for image capture and image processing.

ETX-125 f/15 Maksutov telescope on Polar Mount.   Camera is Point Grey Scorpion 1.4 megapixel (4.65 micron pixels SuperHAD) purchased 2009.  Exposure  about 450 frames at 66.67ms.  Seeing was as good as it gets from a rooftop on the Upper West Side of Manhattan:  clear skies and no wind.  Temperature in high thirties.  Moon one day past first quarter close to the Meridian.   Fewer chimneys in that direction.

Processing at 95% sharpness, which produced 3 frames to stack.  34 MAP points, half-dozen on Clavius, four on Tycho, and the rest evenly distributed on high-contrast targets.  In Astro IIDC Process Image window, RAD sliders start about 2/3 over at the top, and diagonalize to one at the bottom.  Saved as Monochrome Tiff, and opened in Photoshop to save as PNG.

Posted November 6, 2011 by finkh in Uncategorized

Copernicus to Tycho   Leave a comment

Portable Network Graphcs format preserves 12-bit grayscale.  November 5, 2011. Four peaks on the floor of Copernicus.

Posted November 5, 2011 by finkh in Uncategorized