GeoAstro Main Page

Part 4: Moon
  1. Planets
  2. Sun & Moon Polar
  3. Sun & Moon Horizon
  4. MoonPhases
  5. MoonYear
  6. Moon Data
  7. Elevation & Azimuth of the Moon
  8. Moon
  9. Moon Motion
  10. Moon Distance
  11. Moon Libration
  12. MoonLight
  13. Lunar Perigee and Apogee Calculator
    (J. Walker)

Part 1: Sun, Moon, Planets, Stars

Part 2: Sun and Moon Graphics

Part 3: Sun Data

Part 5: Clocks

Part 6: Sundials

Part 7: General Astronomy, Miscellaneous


To get the orbit of the Moon by the Planets applet choose "Ecl. Earth/Moon" from the "View" menu.

Sun & Moon Polar

The position of the Sun and the Moon are shown in polar coordinates for any location and time.

Sun & Moon Horizon

This Java applet displays the azimuth of the Sun and the Moon at rise or set.

Moon Phases

Moon Year

Moon Data

Computing the altitude, azimuth, and the phase of the Moon for any location, date, and time,
drawing digrams of the illuminated fraction, and of rise and set.

Elevation & Azimuth of the Moon

The astronomical algorithms computing the position of the Moon are explained in detail.

Java applet showing the phase and the age of the moon for any date, and computing the duration of the lunation.

Moon Motion

This Java applet computes the motion of the moon (true longitude) and display the orbit.

Moon Distance

The applet is computing the distance of the Moon from the Earth (kilometers), the apparent angular size (arc minutes), and illuminated fraction of the disc of the Moon (per cent), and the Moon's phase:


Lunar Perigee and Apogee Calculator

To display the date, time, and distance of lunar perigees and apogees for a given year, enter the year in the box below and press "Calculate".
(Public domain JavaScript by J. Walker)

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GeoAstro Applet Collection