CAAPrecession_AdjustPositionUsingUniformProperMotion: CAAPrecession_AdjustPositionUsingUniformProperMotion

Description Usage Arguments Value Author(s) References Examples

View source: R/CAAPrecession_AdjustPositionUsingUniformProperMotion.R

Description

CAAPrecession_AdjustPositionUsingUniformProperMotion

Usage

1

Arguments

t

t The number of years from the starting epoch, negative in the past and positive in the future.

Alpha

Alpha The right ascension expressed as an hour angle.

Delta

Delta The declination in degrees.

PMAlpha

PMAlpha The proper motion in right ascension in arc seconds per year.

PMDelta

PMDelta The proper motion in declination in arc seconds per year.

Value

Returns the converted equatorial coordinates in a CAA2DCoordinate class. The x value in the class corresponds to the right ascension expressed as an hour angle and the y value corresponds to the declination 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

1
CAAPrecession_AdjustPositionUsingUniformProperMotion(t = 55, Alpha = 11.20, Delta = 45, PMAlpha = 1.22, PMDelta = 1.01)

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