Fast and stable Kepler solver
Project description
Fast and stable solver for Kepler's equation extracted from exoplanet.
Installation
The best way to install is using pip:
python -m pip install kepler.py
Usage
This package exposes two functions:
kepler: Solves Kepler's equation and returns the cosine and sine of the true anomaly:
import kepler
eccentric_anomaly, cos_true_anomaly, sin_true_anomaly = kepler.kepler(mean_anomaly, eccentricity)
solve: A lower-level interface that is used bykeplerto actually do the solving (Note that this will return garbage for eccentricities out of the range zero to one):
import kepler
eccentric_anomaly = kepler.solve(mean_anomaly, eccentricity)
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