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Title:
Low-precision formulae for planetary positions
Authors:
van Flandern, T. C.; Pulkkinen, K. F.
Affiliation:
AA(U.S. Naval Observatory, Washington, D.C.), AB(U.S. Naval Observatory, Washington, D.C.)
Publication:
Astrophysical Journal Supplement Series, vol. 41, Nov. 1979, p. 391-411. (ApJS Homepage)
Publication Date:
11/1979
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
Astronomical Coordinates, Celestial Mechanics, Moon, Numerical Analysis, Planets, Solar Position, Digital Techniques, Fortran, Geocentric Coordinates, Microprocessors, Minicomputers, Solar Orbits
DOI:
10.1086/190623
Bibliographic Code:
1979ApJS...41..391V

Abstract

Numerous modern applications have created a demand for low-precision (1 arc min) formulas for the positions of the sun, moon, and planets. With the power of a computerized formula manipulator which can handle algebraic and trigonometric expressions, the development of simple expressions for coordinates and elements from the existing analytic theories is now feasible. The paper presents the results of such developments in a form suitable for use with hand calculators, minicomputers, or microprocessors. The outputs are always in the form of series. The series are also available on punched cards or in the form of FORTRAN subroutines. The full-precision (1 arc sec or better) formulas with unlimited time validity are being developed. Several tables are included.

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