Is this flight software?

No. SIDUS models are educational reimplementations. Cross-check before any flight decision.

Mean motion

n, period and circular speed from altitude: ops cadence baseline.

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

n = √(μ/a³)

Circular mean motion and period

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.
SIDUS pure-SI implementation (sidus.tools): Local pure-function implementations in src/lib/physics (educational, independent reimplementation).

Read /llms.txt or call https://sidus.tools/api/mcp. Open the interactive page for live SI inputs.