Hayabusa - The Return To Earth, The voyage home |
Hayabusa - The Return To Earth, The voyage home |
Nov 28 2005, 03:08 PM
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Member Group: Members Posts: 510 Joined: 17-March 05 From: Southeast Michigan Member No.: 209 |
...starting a new thread for Hayabusa's sampling feedback and the return voyage.
After its nail-biting success in November, will there be enough fuel for the Falcon to make it home? -------------------- --O'Dave
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Dec 19 2005, 07:38 PM
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#2
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Senior Member Group: Members Posts: 1870 Joined: 20-February 05 Member No.: 174 |
Holder of the Two Leashes:
"The reason it didn't show much surface variation is because, as this instrument discovered, there was no significate variation to report. " I remain unconvinced of that. The areas of greatest color and albedo variation, or features where composition variations might be expected, were generally well below 1/2 km in size. I'm specifically referring to the high albedo steep slopes inside the freshest craters and the small, slightly darker than general regolith smooth "ponds" in crater bottoms. I note that the camera, which had a TINY CCD detector with non-square pixels and high noise levels (obvious in low-contrast stretched images of a high contrast target) had real trouble seeing color variations, but they were there once enough pixels on a target were averaged. Global color variations are near zero, but weak local ones, mostly on 100 or 50 meter scales and smaller are present. I expect/suspect similar ones were present in infrared wavelengths but were undetected due to resolution and possible signal/noise factors. |
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