KepLime

KepLime is a Rust-accelerated astrodynamics library developed by Citra Space Corporation. It provides high-precision orbit propagation, frame transforms, orbit determination, and related utilities with Python bindings.

Installation

pip install keplime

Or build from source using maturin:

pip install maturin
maturin develop --features python

Quick Start

from keplime.time import ModifiedJulianDate
from keplime.enums import TimeSystem

epoch = ModifiedJulianDate.from_iso("2025-01-01T00:00:00Z")
tt_epoch = epoch.to_system(TimeSystem.TT)
print(tt_epoch.to_iso())

Package Layout

Module	Description
time	High-precision epoch and duration types
enums	Shared enumeration types
elements	Orbital element representations
bodies	Celestial body models and satellite definitions
frames	Reference frame transforms
propagation	SGP4, XP, and numerical propagators
estimation	Orbit determination, initial orbit determination, and Kalman filters
events	Access windows, close approaches, and maneuvers
catalogs	TLE catalog management
schemas	JSON schema types for CITRA payloads