Jupiter and Moon WebCam Images (17 February 2002)
by Christoph Petermann
On the evening of the 17 February 2002 it has been VERY calm and I took the chance. Here are some new image collections mainly of Jupiter. Also one Moon image is here. I have more, but they are not processed yet.
Instrument : GP 102 M refractor = 102mm at F10. Ocular projection with a 12.5 mm Ortho @ 105 mm from chip.
Camera : PS39 Webcam with InfraRed filter
Mount : Vixen GP + an old used SkySensor 3D
Image processing with IRIS 3.54
I always took 100 images and selected the best 30 automatically. These images are stacked after registration. Then a strong unsharp mask is applied (R=0.55 (ca.) and C=70). Using the blur tool with a radius of ca. 0.6 at least. In the colour image all three colours are treated separately.
The Jovian moon Europa coming closer from image to image.
My personal opinion: The best images I ever made with my personal equipment.
| Jupiter 17 February 2002 / 2020 CET
How did I process the image ? I followed Antonio Cidadaos advice.
> bestof a 100 # this selects the from good to bad > select a b # this sorts the images from good to bad > cregister b c 100 100 # register 100 images with threshold 100 > add c 50 # this adds the best 50 images in this case > unsharp 0.5 120 1 # heavy unsharping > wavelet x y 6 # perform wavelet analysis > load x1 # load the highfrequent image > unsharp 0.9 4.00 1 # different unsharping > wavelet x y 6 # again > gauss 1.3 # reduce the last noise > subtract 2000 # remove background brightness > save result
This image is by far the best image I made of Jupiter so far. There is a lot of detail in the image. You find it also in the collection below, but I did nor process it that good.
|Jupiter 17 February 2002 / 2009 .. 2023 CET
Here is a small gif animation of the images in the collection below. Remarkably all the details and the moon EUROPA.
Text and All Images are Copyright by Christoph Petermann DF9CY
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