Convert from ecliptical to equatorial coordinates, using equations 8.3 and 8.4 of reference 1, or, equivalently, equations 12.3 and 12.4 of reference 2.
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.
The code is based on reference 1; see moonAngle()
for comments on
the differences in formulae found in reference 2. Indeed,
reference 2 is only cited
here in case readers want to check the ideas of the formulae; DK
has found that reference 2 is available to him via his university library
interlibrary loan system, whereas he owns a copy of reference 1.
Meeus, Jean, 1982. Astronomical formulae for Calculators. WillmannBell. Richmond VA, USA. 201 pages.
Meeus, Jean, 1991. Astronomical algorithms. WillmannBell, Richmond VA, USA. 429 pages.
Other things related to astronomy:
angle2hms()
,
equatorialToLocalHorizontal()
,
julianCenturyAnomaly()
,
julianDay()
,
moonAngle()
,
siderealTime()
,
sunAngle()
,
sunDeclinationRightAscension()