CAAAngularSeparation_PositionAngle: CAAAngularSeparation_PositionAngle

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

Description

CAAAngularSeparation_PositionAngle

Usage

CAAAngularSeparation_PositionAngle(Alpha1, Delta1, Alpha2, Delta2)

Arguments

Alpha1	Alpha1 The first right ascension expressed as an hour angle.
Delta1	Delta1 The first declination in degrees
Alpha2	Alpha2 The second right ascension expressed as an hour angle.
Delta2	Delta2 The second declination in degrees

Value

Returns the position angle of (Alpha1, Delta1) relative to (Alpha2, Delta2) 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

CAAAngularSeparation_PositionAngle(Alpha1 = 123, Delta1 = -12, Alpha2 = 20, Delta2 = 60)

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