File:Gregoriancalendarleap_solstice.svg
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Summary
DescriptionGregoriancalendarleap solstice.svg |
English: The date of the northern summer solstice between 1750 and 2250. The graph shows the date (in GMT) of the northern summer solstice (the moment the sun reaches it northernmost position in the sky, or the beginning of summer in the northern hemisphere) through the years. As the summer solstice occurs on the same astronomical date each year (although changes may occur on much larger time scales), the graph basically shows the difference between real, astronomical time and the Gregorian calendar. Each year, the Gregorian calendar is approximately 0.24 days faster than the astronomical calendar, which is corrected by a leap day once every four years. This 4-year cycle is clearly visible in the graph. To compensate for the largest part of the remainder of the difference, there is no leap year in 1800, 1900, 2100, 2200, as can be clearly seen in the graph, too. Note that the summer solstice in 1800 and in 2200 are not on equal dates; this shows that the leap year compensation as described before is not perfect and more complicated schemes are necessary to keep the Gregorian calendar synchronized over even longer time scales. However, the Gregorian calendar was actually intended to synchronize with the vernal equinox, not the summer solstice, which is not exactly the same thing over the medium term... |
Date | |
Source | Own work; The data was generated by Astrolabe (https://sourceforge.net/projects/astrolabegenera), which uses the algorithms described in Jean Meeus's "Astronomical Algorithms" (ISBN 978-0943396613). The data have an error of less than 2.6 minutes. |
Author | BasZoetekouw; spelling corrections and revision of subtitle by User:Gerry Ashton on 14 September 2008. |
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- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This work is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or any later version. This work is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See version 2 and version 3 of the GNU General Public License for more details.http://www.gnu.org/licenses/gpl.htmlGPLGNU General Public Licensetruetrue |
Items portrayed in this file
depicts
some value
6 September 2008
image/svg+xml
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:25, 28 February 2024 | 800 × 420 (87 KB) | Demonocrazy | File uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for eu. | |
19:00, 3 March 2023 | 800 × 420 (87 KB) | A876 | 1750 – 2250 is 500 years, not 400. | ||
18:56, 10 January 2022 | 800 × 420 (87 KB) | Kurmanbek | File uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for tr. | ||
00:46, 15 September 2008 | 800 × 420 (112 KB) | Gerry Ashton | {{Information |Description= |Source= |Date= |Author= |Permission= |other_versions= }} | ||
18:04, 14 September 2008 | 800 × 420 (112 KB) | Gerry Ashton | Capitalize the word "Gregorian". | ||
13:30, 6 September 2008 | 800 × 420 (112 KB) | Baszoetekouw | {{Information |Description= |Source= |Date= |Author= |Permission= |other_versions= }} | ||
13:19, 6 September 2008 | 512 × 234 (57 KB) | Baszoetekouw | {{Information |Description={{en|1=The date of the summer solstice between 1750 and 2250. The data was generated by Astrolabe (http://astrolabe.sourceforge.net/), which uses the algorithms described in Jean Meeus's "Astronomical Algorithms" (ISBN 978-0943 |
File usage
- Gregorian calendar
- Leap year
- Talk:Axial precession
- Talk:Gregorian calendar/Archive 3
- Talk:Leap year/Archive 3
- Wikipedia:Reference desk/Archives/Science/2008 September 21
- Wikipedia:Reference desk/Archives/Science/2008 September 6
- Wikipedia:Reference desk/Archives/Science/2012 June 26
- Wikipedia talk:No original research/Archive 34
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Image title | Produced by GNUPLOT 4.2 patchlevel 3 |
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Width | 800 |
Height | 420 |