Clavius
(L9)
The Clavius Saga continues...
On the QCUIAG
e-mail list I learned about a program called MoonStack
which deforms the images prior to stacking to counteract the
differential image movement due to seeing. As my Clavius video
shows lots of image movement I tried this new program on 153
BMP frames selected from the original AVI. The resulting image
was a little off in color. The color-channels were not really
properly aligned. After playing around for some time, I took
the three color-channels, histogram-stretched them, sharpened
them and exportet them to three BMP file which I stacked in
AstroStack. After some
more sharpening the image above was produced...
Clavius is No. 9 in the Lunar
100 list.
The image above is based on the same video like
the one below, but in this case I used the freeware program
Astrostack
to align and stack about 150 single frames. The image is much
better, but there is still much room for improvement.
© Philipp Salzgeber
The Crater Clavius is located in the rough southern
part of the moon, it features a chain of smaller Craters on
its floor. The crater Porter is superimposed on its edge. Russell
W. Porter was a pioneer of Amateur telescope making, helped
found the Stellafane amateur convention and made the famous
drawings of the 200" Hale Telescope on mount palomar even before
the telescope was built
This image is a "stack" of 6 individual frames. By this process
the inherent noise of the video images has been reduced. A gif-"movie"
made of indivdual frames from the video-recording shows the
influence of turbulent atmosphere on astronomical objects. Astronomers
call this phenomenon SEEING
Images of Clavius by other lunar-photographers:
| Camera: |
Sony CCD-TR2200E Pal |
| Telescope: |
Vixen 130mm f/5,5 Newton with 20mm Eyepiece |
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All images © Philipp
Salzgeber
|
Lunar Images by Philipp Salzgeber
