Nine principal astronomical terms for a given precession constant

Nine principal astronomical terms for a given precession constant

Usage

orbit9(k_kyr, gs = LA2004)

Arguments

k_kyr

Precession constant k expressed as the period of the axial precession, in kyr (numeric, > 0; about 25.7 kyr today). Required (no default).

gs

Secular frequencies in arcsec/yr: a list with elements g and s, each a numeric vector of the nine fundamental frequencies g1-g9 and s1-s9. The default LA2004 is the La2004 table (Laskar et al., 2004) defined inside the function. Default=LA2004.

Value

data frame: term, group, frequency (arcsec/yr), period (kyr)