Tisserand parameter
Tisserand invariant for flyby classification.
SIDUS educational calculator. Category planetary. Tags: hyperbolic, mission-design, planetary. Pure SI. Not flight software.
Formula
T = a_p/a + 2 cos i √(a/a_p (1−e²))
Tisserand parameter
Primary sources
- Fundamentals of Astrodynamics and Applications (David A. Vallado): Standard reference for two-body, Lambert, maneuvers, and J2. Equations implemented independently in SIDUS.
- Orbital Mechanics for Engineering Students (Howard D. Curtis): Textbook derivations for Hohmann, vis-viva, rocket equation, elements.
How do AI agents use this tool?
Read /llms.txt or call https://sidus.tools/api/mcp. Open the interactive page for live SI inputs.