HP Forums

Full Version: An HP PPL implementation of the IAU 2000b nutation algorithm
You're currently viewing a stripped down version of our content. View the full version with proper formatting.
An HP PPL version of a nutation algorithm based on the IAU 2000b theory

An Abridged Model of the Precession-Nutation of the Celestial Pole, D. McCarthy and B. Luzum,
Celestial Mechanics and Dynamical Astronomy, 85: 37-49, 2003.

The software and documentation can be downloaded from

Updated on December 1, 2022

This version allows the user to specify how many rows of tabular data are used in the nutation computations. This can be done on line 20 of the source code using the following syntax.

// number of rows of data to use in calculation (1 <= nrows <= 78)

EXPORT nrows := 78;

A low-precision nutation version typically uses the first 13 rows of data (nrows := 13).

This version is available at the same download link as the original.
Reference URL's