celeries.perham.LazyPerHam

class celeries.perham.LazyPerHam(degree, km_max, spatial=True)

Lazy version (stores the results for re-use) of PerHam.

Parameters:

degreeint

Degree of the development.

km_maxint

Maximum value of \(|k_1|+|k_2|\) that will be required when computing direct terms \(k_1 \lambda_1 + k_2 \lambda_2\) by calling the direct() method (this is used for Laplace coefficients recurrence relations). Set km_max=-1 to avoid using recurrence relations.

spatialbool

Whether to consider the 3D or the co-planar only case.

Methods

coorbital_direct()	Direct part of the coorbital Hamiltonian using the method of Robutel & Pousse (2013).
coorbital_indirect()	Indirect part of the coorbital Hamiltonian using the method of Robutel & Pousse (2013).
direct(k)	Direct part of the Hamiltonian with coefficients k for the mean longitudes.
indirect(k)	Indirect part of the Hamiltonian with coefficients k for the mean longitudes.