SPICE-free Python/C library encoding JPL DE441 ephemeris as hyperdimensional computing vectors over a graph Laplacian, covering 52 solar system bodies.
Key Takeaways
Two-stage pipeline: integer-ALU phase-residue encoders (bip/C/complex128) feed an FPU complex64 HD pipeline; native C backend runs ~1000x faster than pure Python.
52-body roster includes Saturnian Lagrange trojans (Telesto, Calypso, Helene, Polydeuces) and Jovian irregulars (Himalia, Pasiphae, Sinope); first L4/L5 entries trigger multiplicity-2 Laplacian degeneracy.
Resonance-graph ITN chain search uses Dijkstra-style traversal over (body, epoch) state space with small-integer (p,q) gear-ratio signatures per leg.
Spectral body-architecture surface (bridge.body_architecture) discovers the asteroid-belt boundary and Neptune-Pluto 2:3 lock via the Fiedler vector without being given that information.
predict_itn_accessibility gives a closed-form spectral delta-v estimate at microseconds-per-query vs ~1.5s for full Dijkstra; R2 improved from 0.51 to 0.64 with 2-D Fiedler embedding.
