Along-track / ΔM

Map along-track separation ↔ mean anomaly offset on circular orbit.

SIDUS educational calculator. Category orbital. Tags: GNC, operations, orbital, relative-motion, rendezvous. Pure SI. Not flight software.

Formula

Δy ≈ a ΔM

Along-track separation

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.
• Spaceflight Dynamics (William E. Wiesel): Relative motion, rendezvous, and phasing context complementary to Vallado/Curtis.

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.