File:Lunar eclipse umbra lightcurve.png
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Summary[edit]
| Description |
English: Intensity curve of Earth's shadow at 380,000 km distance (typical Moon distance). The time coordinate is with respect to the rim of the umbra. The umbra is defined here as that of the solid body of the Earth without the atmosphere. The 'visual' umbra is about 2% larger due to the atmosphere's extinction and refraction. The lower (orange) curve shows the (absolute value of the) gradient of the logarithm of the intensity, which is approximately proportional to the visual gradient. The visual rim of the umbra is marked by the point of steepest gradient.
Deutsch: Intensitätskurve des Erdschattens aus Sicht eines Beobachters auf dem Mond (Entfernung 380000 km) im Fall einer zentralen totalen Mondfinsternis. Die untere Kurve gibt den negativen Gradienten (Absolutbetrag im Zeitraum vor Totalitätsmitte) des (dekadischen) Logarithmus der Helligkeit an. |
| Source | self made, Own theoretical model based on 1976 standard atmosphere and atmospheric extinction curves from dtv-Atlas zur Astronomie, 9th edition 1987. Plotted with Gnuplot. |
| Author | SiriusB |
| Other versions | Image:Lunar eclipse umbra lightcurve dark.png, Image:Lunar eclipse umbra lightcurve arcmins.png, Image:Lunar eclipse umbra lightcurve dark arcmins.png, |
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
  
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| This licensing tag was added to this file as part of the GFDL licensing update. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 07:07, 6 April 2005 | | 1,421 × 1,033 (46 KB) | SiriusB (talk | contribs) | Fixed wrong right x label (I for intensity) |
| 14:28, 31 March 2005 |  | 1,421 × 1,033 (46 KB) | SiriusB (talk | contribs) | * Description: Intensity curve of Earth's shadow at 380,000 km distance (typical Moon distance). * Author: SiriusB * Source: Own theoretical model based on 1976 standard atmosphere and atmospheric extinction curves from "DTV Atlas zur Astronomie". Plotted |
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