CAAPrecession_PrecessEcliptic: CAAPrecession_PrecessEcliptic

In helixcn/skycalc: Computational Astronomy in R based on PJ Naughter's AA+ library

Description

CAAPrecession_PrecessEcliptic

Usage

CAAPrecession_PrecessEcliptic(Lambda, Beta, JD0, JD)

Arguments

Lambda	Lambda The ecliptical longitude in degrees.
Beta	Beta The ecliptical latitude of the star in degrees.
JD0	JD0 The date in Dynamical time corresponding to the initial epoch.
JD	JD The date in Dynamical time corresponding to the final epoch.

Value

Returns the converted ecliptic coordinates in a CAA2DCoordinate class. The x value in the class corresponds to the ecliptical longitude in degrees and the y value corresponds to the ecliptical latitude in degrees.

Author(s)

C++ code by PJ Naughter, imported to R by Jinlong Zhang

References

Meeus, J. H. (1991). Astronomical algorithms. Willmann-Bell, Incorporated.

Examples

CAAPrecession_PrecessEcliptic(Lambda = 134, Beta = 12, JD0 = 2418882, JD =  2455382)

helixcn/skycalc documentation built on March 31, 2021, 5:45 a.m.