File:Analemma earth.svg
Original file (SVG file, nominally 512 × 335 pixels, file size: 164 KB)
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Summary
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| Description |
English: ---------------
This is a plot of the position of the sun at 12:00 noon at en:Greenwich Observatory, England (en:latitude 51.4791 deg north, en:longitude 0) during the year 2006. The horizontal axis is the azimuth angle in degrees (180 degrees is facing south). The vertical axis is the altitude in degrees above the horizon. The first day of each month is shown in black, and the en:solstices and en:equinoxes are shown in green. It can be seen that the equinoxes occur at altitude φ=90 - 51.4791 = 38.5209 degrees, and the solstices occur at φ±ε where ε is the en:axial tilt of the earth, 23.439 degrees. This plot was constructed using altitude and azimuth data generated by JPL Horizons. |
| Source | Own work |
| Author | Xakej8p6cha3eyuh |
| Other versions | http://commons.wikimedia.org/wiki/File:Analemma_Earth.png |
The data was collected using through JPL Horizons. Plotting was done with MATLAB and SVG conversion with plot2svg.m.
Licensing
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I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:30, 11 May 2010 | | 512 × 335 (164 KB) | Nimakha (talk | contribs) | Changed the male ordinal indicators to proper degree signs |
| 21:58, 29 November 2009 |  | 512 × 335 (102 KB) | Xakej8p6cha3eyuh (talk | contribs) | {{Information |Description={{en|1=--------------- This is a plot of the position of the sun at 12:00 noon at en:Greenwich Observatory, England (en:latitude 51.4791 deg north, en:longitude 0) during the year 2006. The horizontal axis is the azimuth angle i |
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