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AstronomicalAlgorithms

AstronomicalAlgorithms is a FREE portable ANSI C and Perl implementation of some of the algorithms published in Astronomical Algorithms by Jean Meeus.

Willmann-Bell does NOT provide source code for the second edition of this book. Only owners of the first edition may BUY the related source code, and owners of the second edition are not allowed to buy the source code for the first edition (this has been confirmed by mail on August 31, 1999).

I therefore program myself some of the algorithms published in the book as I have the time, and I give the code for free.

You may use this source code as long as

• you mention clearly that its latest version can be obtained free of charge from www.christophedavid.org
• you send me a free copy of whatever you make using this code.
• AstronomicalAlgorithms.c
• AstronomicalAlgorithms.h
• DateFromJulianDay.c
• DateToJulianDay.pl
• DateFromYearDay.c
• DayOfWeek.c
• DayOfYear.c
• EasterSunday.c
• eclipsesJDE.c
• GreenwichSideralTime.c
• InterpolationDifferences.c
• IsLeapYear.c
• JulianDay.c
• MoonPhasesJDE.c
• RhoCosPhiTwo.c
• RhoSinPhiTwo.c
• SolarCoordinates.c
• AstronomicalAlgorithms.c

Help, comments and suggestions are welcome: write to Christophe DAVID .

Computed with this code:

    * Christian Easter dates from 1583 to 2303
    * Compressed files with moon phases dates : 1583 -> 2999 (+1 Mb) or -2000 -> 6000 (+6 Mb).

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