File:Lunar_libration_with_phase_Oct_2007_(continuous_loop).gif
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Original file (640 × 642 pixels, file size: 9.64 MB, MIME type: image/gif, looped, 56 frames, 5.6 s)
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DescriptionLunar libration with phase Oct 2007 (continuous loop).gif | |
Date | (UTC) |
Source | |
Author | Tomruen |
Other versions |
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Public domainPublic domainfalsefalse |
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{original upload log}
This image is a derivative work of the following images:
- File:Lunar_libration_with_phase_Oct_2007.gif licensed with PD-self
- 2007-11-06T01:03:49Z Tomruen 640x642 (10111965 Bytes) 'Summary == Information | Description = {en|[Moon|Lunar][en:libration..for more descriptions'
[:fr:Libration|[:fr:lune|lune]. description'
Uploaded with derivativeFX
Technical
- Book: "Astronomical Formulae for Calculators, 4th edition", Jean Meeus, 1988, published by "Willmann-Bell, Inc"
- Chapter 30 "Position of the Moon"
Source bitmap for projection from NRL's Clementine Spacecraft:
- Animation
- 60 frames, 12 hour step.
- Period used: 29.5 days
- Animation began and ended near Apogee to minimize "jumping" when cycles back to the start.
- New moon given an unreal 1% intensity "Ambient light" to show motion in all phases.
- View assumed from the center of the earth. (Geometrically impossible, but best demonstration of monthly libration caused by moon's motion versus the shorter daily libration that would be included from the surface of the earth.)
This version of the animation has less frames compared to the original to make the loop continuous (jumpiness when restarting).
Items portrayed in this file
depicts
image/gif
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 17:59, 18 October 2020 | 640 × 642 (9.64 MB) | Jahobr | the limit is no longer at 12.2 MPixel. better version, but less frames compared to the original to keep the continuous loop | |
08:23, 7 November 2011 | 450 × 451 (2.46 MB) | Travürsa | Removed a few frames to decrease the jumpiness when restarting. | ||
00:18, 30 April 2010 | 450 × 451 (2.44 MB) | Ilmari Karonen | {{Information |Description={{en|Lunar libration. ''see below for more descriptions''}} {{fr|Librations de la lune. ''Voir une description détaillée en dessous''.}} |Source=*[[:File:Lunar_libratio |
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