Aristarchus and Gassendi with the
Orion 10" f/3.9 Newtonian Astrograph
June 16, 2016
Note: Primordial usage of South is up in all images, more info below.
Here is a shot of the moons full disk that evening. It is composed of four separate images in a
panorama of the full disk shot at prime focus of the 10 inch. You can see Aristarchus on the terminator to the lower
right, and Gassendi is above it about an inch higher here.
this night was like looking into a bowl of jiggling jello. Out
of two dozen shots I took, only these two are of acceptable quality,
however they are two of my favorite craters! The processing challenge
of Aristarchus (top image set) is to prevent the inner rim from
being totally over exposed while still keeping a bright image
of the terminator and surrounding terrain. To accomplish this,
two images were taken, one exposing the inner crater wall properly
and the second the surrounding terrain. A mask was created from
the image itself to merge the two and create this rendition.
The second set
is one of my jinx craters! I have yet to really get a great shot
of this nearly sunken ring with its shrinkage cracks well recorded.
This one is good, but I know I can do better. Enjoy these two
images while I await better seeing!
Instrument: Orion (GSO) 10" f/3.9 with 5x Powermate
Platform: Astrophysics AP1200
CCD Camera: Image Source DMK 51
Filter: Orion IR Pass
Exposure: 1/30 sec 12fps
Location: Payson, Arizona
Elevation: 5150 ft.
Sky: Seeing 2/5, Transparency 7/10
Outside Temperature: 65F
25/1200 best frames, alignment in Autostakkert, USM, Levels and
Contrast Masking In Photoshop CS2 and Image J.|