GEO / sync radius
Synchronous circular radius and altitude for a given period (Earth sidereal day default).
SIDUS educational calculator. Category orbital. Tags: geo, mission-design, orbital, satellite. Pure SI. Not flight software.
Formula
a³ = μ T² / (4π²)
Synchronous / GEO radius
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.
- Space Mission Engineering: The New SMAD (Wertz, Everett, Puschell (eds.)): Mission engineering handbook: RF links, constellations, and ops framing.
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.