astrochron (version 0.3.1)

laskar: Eccentricity, Tilt and Precession Solutions for the Past 250 Million Years

Description

Astronomical solutions from Laskar: Precession, obliquity, and eccentricity solutions from Laskar et al. (2004), and the four eccentricity solutions from Laskar et al. (2011).

Usage

laskar

format

Time (ka before present, from J2000), precession angle (longitude of perihelion from moving equinox, in radians), obliquity (radians), eccentricity (LA10a), eccentricity (LA10b), eccentricity (LA10c), eccentricity (LA10d), eccentricity (LA04)

source

http://www.imcce.fr/Equipes/ASD/insola/earth/earth.html

References

Laskar, J., Robutel, P., Joutel, F., Gastineau, M., Correia, A.C.M., Levrard, B., 2004, A long term numerical solution for the insolation quantities of the Earth: Astron. Astrophys., Volume 428, 261-285.

Laskar, J., Fienga, A., Gastineau, M., Manche, H., 2011, La2010: A new orbital solution for the long-term motion of the Earth: Astron. Astrophys., Volume 532, A89.