Barkas:Lunar libration with phase2.gif

Lunar_libration_with_phase2.gif(356 × 334 piksel, ukuran barkas: 932 KB, jinis MIME: image/gif, mubeng, 50 rangka, 5,0 d)

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Ringkesan

Panyandra
English: Lunar libration. see below for more descriptions
Français : Librations de la lune. Voir une description détaillée en dessous.
Deutsch: Die Libration des Mondes. Für weitere Informationen, siehe unten
Українська: Лібрації Місяця . Більш детальний опис див. нижче
中文:月球天秤动更多描述参见下面的内容
Tanggal (published on Commons)
Sumber English Wikipedia, original upload 7 September 2005 by Tomruen [1]
Juru pangarang Tomruen
Vèrsi liya
File:Lunation animation April 2007.gif
April 2007 animation, 60 frames, no phase shown

Lisènsi

Public domain Kula, sing nduwèni hak cipta karya iki, nerbitaké karya iki nèng domain umum. Iki kanggo nèng saubenging dunya.
Nèng saperangan nagara iki mungkin ora dièntokaké; yèn mangkono:
Kula ngawèhaké sapa waé hak migunakaké karya iki kanggo maksud apa waé, tanpa katemton apa waé, kajaba ana katemton kuwi dibutuhaké déning hukum.

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
    • 50 frames were created, equally spaced in time.
    • Period used: 27.21222 days (Draconic month of nodes)
    • Animation began and ended at 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.)

Astronomical events

  • Sept 1, 2:23 UT - Apogee - Moon farthest from earth's center [Cancer]
  • Sept 3, 1:48 UT - New Moon [Leo]
  • Sept 6, 10:53 UT - Descending Node - On ecliptic circle, heading north to south. [Virgo]
  • Sept 11, 11:40 UT - First Quarter - Rises around noon, and at zenith near sunset [Scorpio]
  • Sept 13, 6:21 UT - Southern Limit - At farthest ecliptic south of the moon's orbit. [Sagittarius]
    • Also near farthest south declination as well.
  • Sept 16, 13:54 UT - Perigee - Closest point on orbit to earth's center. [Aquarius]
  • Sept 18, 2:04 UT - Full Moon - A "large and southern" moon up all night! [Pisces]
  • Sept 18, 8:11 UT - Ascending Node - On ecliptic, heading south to north. [Pisces]
  • Sept 25, 6:44 UT - Third Quarter - Rises after midnight, near zenith around sunrise. [Gemini]
  • Sep 26, 5:17 UT - Northern Limit - At farthest ecliptic north point of the moon's orbit. [Gemini]
    • Also near farthest north declination as well.
  • Sep 28, 15:31 UT - Apogee - Farthest point on orbit from earth's center. [Cancer]

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