GEO drift rate

Linear longitude drift for |a − a_GEO| / a_GEO < 0.1.

SIDUS educational calculator. Category orbital. Tags: geo, operations, orbital. Pure SI. Not flight software.

Formula

λ̇ ∝ −(a − a_GEO)/a_GEO

Linear drift within 10% of GEO

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.