Project Summary
kepler is a library of C routines for astronomical calculations. It features the following:
* The entire VSOP87 theory for calculating the positions of the eight planets.
* The entire ELP 2000-82B theory for calculating the position of the Moon.
* An analytical theory for calculating Pluto's position for the period 1700AD-2100AD.
* The ability to convert osculating orbital elements to heliocentric coordinates.
* The latest IAU 2006 precession and IAU 2000A nutation models.
* Routines for calculating sidereal time using the current IAU resolutions.
* An implementation of the Ron/Vondrak theory of annual aberration.
* Routines for Julian date calculations.
* Routines for coordinate transformations, rotations and parallax corrections.
In a Nutshell, kepler_library...
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took an estimated 21 years of effort (COCOMO model)
starting with its first commit in March, 2010
ending with its most recent commit over 7 years ago
Quick Reference
GNU General Public License v3.0 or later
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These details are provided for information only. No information here is legal advice and should not be used as such.
This Project has No vulnerabilities Reported Against it
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30 Day SummarySep 25 2026 — Oct 25 2026
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12 Month SummaryOct 25 2025 — Oct 25 2026
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