2008 Sun and Polaris Ephemerii
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| These pages/files contain Sun and Polaris Ephemerii
for the year 2008 suitable for use by land surveyors. These versions were
generated by Jerry Wahl and verified by spot checks with the Astronomic
Almanac and other sources. No warrantee is expressed or implied as to their
accuracy or suitability for any specific purpose. These documents are offered
as freeware.
You are free to use and copy these documents for any personal or business use but not to charge or redistribute for any fee or use them in a commercial product. Web format: Showing data by the month. FTP to download Windows help file format. FTP to download CEFB data collection format file (zipped). The Windows Help file format will be available by January 8th. In addition this year we hope to add several formats of star ephemerii and some resources for students or teachers instructing survey astronomy.If you find any errors, please contact the author at jwahl@qubicle.com 2007 and earlier Ephemeris pages |
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Explanation of (some) Column Data AbbreviationsDateMonth abbreviatedDay of the Month Number Day of the Week Name abbreviated SunAll values are for 0h GMT aka UT1.Declination: in degrees minutes and seconds Note: negative values are south declination. GHA: Greenwich Hour Angle in degrees minutes and seconds. Eq o Time: EOT: Equation of Time in minutes and seconds. Semi-DI: SD: Semi Diameter of the Sun in minutes and seconds. PolarisAll values are for 0h GMT aka UT1.Declination: in degrees minutes and seconds. Some users may use polar distance which is the angular complement of declination p - 90degrees minus declination. GHA: Greenwich Hour Angle in degrees minutes and seconds. Upper: TUC: Time of upper
culmination or upper meridian passage. This is redundant in the sense
that it is derived from and used in the same way as the GHA already tabulated.
It is provided for the benefit of a few users who are familiar with it's
use in preference to GHA. Note: this is the time at Greenwich,
and as such must be corrected to the longitude of the observer as well
as for the time zone of the observer.
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