Ignoring the likely functionally uninteresting bond vibrations, the very shortest times are the fundamental group librations and rotations of methyl groups, which typically occur in the picosecond range.
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This can be simplified further by recognizing that local bond librations and other motions are likely to occur on very different timescales, and thus their averages can be computed independently.
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The visibility of this formation is affected bylibration, and even under favorable conditions it is highly foreshortened.
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At this location the crater appears much foreshortened and can only be observed during favorable librations.
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As a result, spacecraft inlibrationpoint orbits must use their propulsion systems to perform orbital station-keeping.
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That is, the features that would produce a contour effect along the limb due tolibration.
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It was the first artificial object placed at a so-calledlibrationpoint, proving that such a suspension between gravitational fields was possible.
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It can also become hidden from sight due tolibration, or brought into a more favorably viewing position.
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In this location the vicinity of the crater can be viewed during favorable librations, although it is viewed from on edge.
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Due to its proximity to the western lunar limb, this area of the surface is occasionally visible during favorable librations.
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It lies just beyond the western limb, at the far edge of the region that is brought into view during favorable librations.
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The study was conducted inside the interval wherelibrationhappens.
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In addition, to the extent that tides produce heat along fractureslibrationmay affect the magnitude and distribution of such tidal shear heating.
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Other observations suggest they move around thelibrationpoints in ellipses of about 6 by 2 degrees.
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It can also become hidden from sight due to the effects oflibration.
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