New Images Uploaded
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Arnold Ashcraft
Jan 3, 2009, 9:59:20 PM1/3/09
to lcross_ob...@googlegroups.com
Folks:
I just uploaded two images, one of the northern limb of the moon:
CAshcraft_200901040127.jpg
and another of the southern limb:
CAshcraft_200901040124.jpg
Note: these images were taken at 2540 mm focal length, not using the Barlow, so the magnification is only half that of my previous images.
Arnold C. Ashcraft
184mm aperture Schupmann Medial
2540mm focal length
Type of camera used: The Imaging Source DMK 31BF03
Camera detector dimensions:
1024x768 pixels, 4.76 mm x 3.57 mm
Pixels are 4.65 x 4.65 microns.
Exposure information: gain = 1023, 0.033 secs/frame, 30 frames/sec
Image capture software: IC Capture.
Red #25 filter, NIR Blocking filter
Registax4 for aligning, stacking and sharpening.
Rotated and cropped in PhotoShop
Observatory location: Perrineville NJ, 08535
40° 13' 56.6" N Latitude
75° 26' 37.6" W Longitude
164 ft above sea level
Jim Mosher
Jan 4, 2009, 12:11:01 AM1/4/09
to LCROSS_Observation
Nice work, Clif!
By overlaying your north polar images one can easily track the polar
dots that were observed during the January 2nd (UT) training
exercise. With the improved lighting it's now clear that in this
perspective the dots labeled at the LCROSS "Crater A" target position
on Jan 1-2 were being seen behind the 55-km diameter crater
Scoresby.
Judging from the Clementine mosaic, I'd guess that the brightest dot
is the poleward rim of De Sitter A, or possibly De Sitter M behind
that. Hopefully the digital elevation models of the pole will
eventually clarify which feature would be seen first with this
lighting and libration. In any event, it would appear (as previously
suspected) that these dots are foreground peaks well in front of
Nansen F (on whose floor the "Crater A" target position lies).
-- Jim
By overlaying your north polar images one can easily track the polar
dots that were observed during the January 2nd (UT) training
exercise. With the improved lighting it's now clear that in this
perspective the dots labeled at the LCROSS "Crater A" target position
on Jan 1-2 were being seen behind the 55-km diameter crater
Scoresby.
Judging from the Clementine mosaic, I'd guess that the brightest dot
is the poleward rim of De Sitter A, or possibly De Sitter M behind
that. Hopefully the digital elevation models of the pole will
eventually clarify which feature would be seen first with this
lighting and libration. In any event, it would appear (as previously
suspected) that these dots are foreground peaks well in front of
Nansen F (on whose floor the "Crater A" target position lies).
-- Jim
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