Moon-Earth Umbra/Penumbra diagram
The eclipse Moon-Earth Umbra/Penumbra diagram is displayed in real time at the observer’s location. Two orientations are available:
- the zenith up or horizontal coordinates (view matches what you see through binoculars),
- the celestial north up or equatorial coordinates.
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The Moon-Earth Umbra/Penumbra diagram not only shows the relative positions, but also displays:
- the ecliptic
- the celestial north
- the lunar north
- the Moon’s surface
- the Earth’s umbra and penumbra outlines
- the elevation and azimuth of the Moon or the Earth’s umbral/penumbral shadow
- the sunrise and sunset times
A contextual menu that can be invoked with a right click over the Moon-Earth Umbra/Penumbra diagram will let you select various options:
- enable/disable the display of the ecliptic as a dotted yellow line
- enable/disable the display of the celestial north as a red tick mark
- enable/disable the display of the lunar north as a green tick mark
- enable/disable the display of the Moon’s surface
- enable/disable the display of the Earth’s umbra and penumbra outlines
- enable/disable the switch between horizontal and equatorial coordinates
- display or hide the lunar or Earth’s umbral/penumbral shadow elevation and azimuth in degrees
- enable/disable the display of the times of sunrise and sunset
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