CAAAngularSeparation_DistanceFromGreatArc: CAAAngularSeparation_DistanceFromGreatArc

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

Description

CAAAngularSeparation_DistanceFromGreatArc

Usage

CAAAngularSeparation_DistanceFromGreatArc(Alpha1, Delta1, Alpha2, Delta2, Alpha3, Delta3)

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
Alpha3	Alpha3 The third right ascension expressed as an hour angle.
Delta3	Delta3 The third declination in degrees

Value

Returns the distance of (Alpha3, Delta3) to the great circle (Alpha1, Delta1) - (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_DistanceFromGreatArc(Alpha1 = 123, Delta1 = 0, Alpha2 = 80, Delta2 = 12, Alpha3 = 55, Delta3 = 60)

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