obliquity {skyscapeR}

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

swe_calc_ut

Examples

#' # Obliquity for year 3999 BC:
obliquity(-4000)