Calculates the parameter of the nutation.
[epsilon_0, delta_epsilon, delta_psi] = par_nutation(t_j2k)
time in the epoch J2000.0
mean obliquity of the ecliptic [rad]
nutation in longitude [rad]
nutation in obliquity [rad]
Calculates the parameter of nutation, the mean obliquity of the
ecliptic epsilon_0
, the nutation in longitude
delta_psi
and in obliquity
delta_epsilon
.
Precision: ca. 1'',
(matrix aware)
No warranty, there are no inputchecks.