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Installation
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Breaking changes
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Tutorials

The basics
Event detection
Variational ODEs
More on the expression system
Parallelisation and vectorisation
Extended and reduced precision
Lagrangian and Hamiltonian mechanics
Interoperability with SymPy
Compiled functions
EOP and space weather data
- Working with EOP data
- Working with space weather data
A differentiable SGP4 propagator
Analytical theories and models
Pickle support
JIT compilation and caching

Examples

Celestial mechanics and astrodynamics
Event detection
Machine Learning
Variational equations
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API reference

Common keyword arguments
Expression system
Numerical integrators
- heyoka.taylor_adaptive
- heyoka.taylor_adaptive_batch
Variational ODE systems
- heyoka.var_ode_sys
- heyoka.var_args
Lagrangian and Hamiltonian mechanics
- heyoka.lagrangian
- heyoka.hamiltonian
Models
EOP and space weather data
JIT compilation
- heyoka.code_model

Repository
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Analytical theories and models

Analytical theories and models#

Introduction to the VSOP2013 planetary theory
Introduction to the ELP2000 lunar theory
Introduction to the IAU2000/2006 precession-nutation theory
Introduction to the EGM2008 model

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A differentiable SGP4 propagator

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Introduction to the VSOP2013 planetary theory

By Francesco Biscani and Dario Izzo

© Copyright 2020-2025 Francesco Biscani and Dario Izzo.