eclipticalToEquatorial {oce}R Documentation

Convert ecliptical to equatorial coordinate

Description

Convert from ecliptical to equatorial coordinates

Usage

eclipticalToEquatorial(lambda, beta, epsilon)

Arguments

lambda

longitude, in degrees, or a data frame containing lambda, beta, and epsilon, in which case the next to arguments are ignored.

beta

geocentric latitude, in degrees

epsilon

obliquity of the ecliptic, in degrees

Details

The method is taken from equations 8.3 and 8.4 of [1], or, equivalently, from equations 12.3 and 12.4 of [2].

Value

A data frame containing columns rightAscension and declination both in degrees.

Author(s)

Dan Kelley, based on formulae in [1] and [2].

References

1. Meeus, Jean, 1982. Astronomical formuae for Calculators. Willmann-Bell. Richmond VA, USA. 201 pages.

2. Meeus, Jean, 1991. Astronomical algorithms. Willmann-Bell, Richmond VA, USA. 429 pages.


[Package oce version 0.9-18 Index]