oce (version 0.9-18)

eclipticalToEquatorial: 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

Value

• A data frame containing columns rightAscension and declination both 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].

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.