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Home → Science → Astronomy → Software → Toolkits and Observing Utilities

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Toolkits and Observing Utilities
 
http://www.jqjacobs.net/astro/epoch_2000.html


Epoch_2000, Temporal Epoch Calculator by James Q. Jacobs
Download an Excel spreadsheet to calculate temporal variation in astronomic "constants, " obliquity of the ecliptic and illumination angles at specified latitudes.
 
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