obliquity {skyscapeR} | R Documentation |
Computes obliquity of the ecliptic
Description
This function calculates the obliquity for a given epoch. It is a
wrapper for function swe_calc_ut
of package swephR.
Usage
obliquity(year = skyscapeR.env$cur.year)
Arguments
year |
Year for which to calculate the obliquity. Defaults to present year as given by Sys.Date |
References
Laskar, J. et al. (2004), A long-term numerical solution for the insolation quantities of the Earth, Astron. Astroph., 428, 261-285, doi:10.1051/0004-6361:20041335.
See Also
Examples
#' # Obliquity for year 3999 BC:
obliquity(-4000)
[Package skyscapeR version 1.0.0 Index]