Custom body (μ from M, R)

Build μ = GM from mass and radius: surface g, escape, circular speed, optional SOI vs primary.

SIDUS educational calculator. Category utilities. Tags: mission-design, orbital, reference, utilities. Pure SI. Not flight software.

Formula

μ = G M · v_esc = √(2μ/r) · r_SOI ≈ a(m/M)^{2/5}

Custom body from mass and radius

Primary sources

• JPL Horizons (NASA / JPL): Solar System ephemerides and body constants.
• IAU / planetary constants practice (IAU): Astronomical constant conventions used alongside JPL body data.
• Fundamentals of Astrodynamics and Applications (David A. Vallado): Standard reference for two-body, Lambert, maneuvers, and J2. Equations implemented independently in SIDUS.

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.