Engineering
Every trajectory in NEO Radar is integrated from JPL Horizons ephemeris with full gravitational perturbation from the outer planets. The numbers you see are the numbers a mission planner would see.
01 / Kepler
Solves Kepler's equation, not lookup tables.
Mean anomaly to eccentric anomaly via Newton-Raphson with adaptive seed, converging to 1×10⁻¹² in under four iterations even for high-eccentricity orbits.
M → E → ν e < 0.99 ε = 1e-12
02 / Perturbation
Jupiter and Saturn pulled, and you see the pull.
Toggle outer-planet gravity on or off. The uncertainty cone widens visibly on Jupiter-flyby trajectories — what mission planners call the keyhole problem.
N-body RK4 Adaptive Δt All 8 planets
03 / Data
JPL Horizons ephemeris, locally cached.
Pulled directly from JPL Horizons and pinned to disk for instant access. Observation arcs and uncertainty parameters travel with every object — no approximations, no drift.
NASA NeoWs SPICE kernels Local cache