Description Usage Arguments Value Author(s) References See Also
Convert from ecliptical to equatorial coordinates, using equations 8.3 and 8.4 of [1], or, equivalently, equations 12.3 and 12.4 of [2].
1  eclipticalToEquatorial(lambda, beta, epsilon)

lambda 
longitude, in degrees, or a data frame containing

beta 
geocentric latitude, in degrees 
epsilon 
obliquity of the ecliptic, in degrees 
A data frame containing columns rightAscension
and
declination
both in degrees.
Dan Kelley, based on formulae in [1] and [2].
1. Meeus, Jean, 1982. Astronomical formuae for Calculators. WillmannBell. Richmond VA, USA. 201 pages.
2. Meeus, Jean, 1991. Astronomical algorithms. WillmannBell, Richmond VA, USA. 429 pages. The code is based on [1]; see help(moonAngle,"oce") for comments on the differences in formulae found in [2]. Indeed, [2] is only cited here in case readers want to check the ideas of the formulae; DK has found that [2] is available to him via his university library interlibrary loan system, whereas he owns a copy of [1].
Other things related to astronomy: equatorialToLocalHorizontal
,
julianCenturyAnomaly
,
julianDay
, moonAngle
,
siderealTime
, sunAngle
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