Conjunction collision probability

Educational 2-D Chan or Foster Pc from miss, covariance and hard-body radii.

SIDUS educational calculator. Category satellite. Tags: analysis, operations, satellite. Pure SI. Not flight software.

Formula

Pc = e^{−ξ²/2}(1−e^{−R²/2σσ})

Educational conjunction Pc

Primary sources

• Fundamentals of Astrodynamics and Applications (David A. Vallado): Standard reference for two-body, Lambert, maneuvers, and J2. Equations implemented independently in SIDUS.
• NASA Conjunction Assessment Risk Analysis (CARA) (NASA): Public conjunction Pc practice. SIDUS implements an educational 2-D Chan/Alfriend-class formula, not an operational CARA product.

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.