ATMAN v5.0 — Erebo (Planet 9 Hypothesis): Ecliptic Longitude Sweep and Positional Refinement — Paper II

This repository contains the data, code, and results of the ecliptic longitudesweep presented in Paper II of the Erebo series, performed with ATMAN v5.0and the Gravitational Resonance Module (MRG). **Main result:** The ecliptic longitude of the hypothetical planet Erebo(Planet 9 candidate) is constrained to λ = 156° ± 4°, corresponding to apredicted sky position of α (J2000) = 10h 16m, δ ≈ 0° (Leo, near thecelestial equator). This represents a 34° westward revision from thepreliminary estimate of 190° reported in Paper I, achieved by extendingthe longitude grid to 150°–310° and performing a two-stage coarse+fine sweep. **Simulation parameters:**- Planetary mass: 7 M⊕- Orbital distance: 600 AU- Inclination: i = 30°- Integration span: 1 Myr (dt = 500 yr, 500 checkpoints/run)- ETNOs: 10 objects- Metrics: Rayleigh R-statistic, MRG spectral consonance, phase coherence- Ghost peaks detected: 0- All outputs SHA-256 signed for full reproducibility **Key metrics at λ_best = 156°:**- R_max = 0.48912470- Combined score S = 0.82704157- Consonance = 1.000 | Coherence = 0.992- Uncertainty reduction factor: 15× (from ±60° to ±4°) **Files included:**- erebo_longitude_sweep.py — main simulation script (ATMAN v5.0)- erebo_sweep_patch_150_190.py — extension patch for λ < 190°- erebo_sweep_coarse_20260511_191630.json — coarse sweep 190°–310°- erebo_sweep_patch_150_188_20260512_001603.json — patch 150°–188°- erebo_sweep_merged_20260512_001543.json — merged coarse dataset- erebo_sweep_fine_20260512_001721.json — fine sweep 150°–180°, Δλ=2°- erebo_sweep_summary_20260512_001543.json — full analysis summary- erebo_longitude_sweep_figure.pdf — publication figure (2-panel, vectorial)- erebo_longitude_sweep_figure.png — publication figure (180 dpi raster)- erebo_paper2_results_section.md — Section 3 draft (Results) **Acknowledgments:**Computational assistance provided by Claude (Anthropic, claude-sonnet-4-6)and Google Gemini during code development, data analysis, and manuscriptdrafting. All scientific decisions, interpretations, and conclusions arethe sole responsibility of the author. This work is part of the ATMAN v5.0 suite. See related records below. Author: Ariel Fernando Martini, Buenos Aires, Argentina (2026).Contact: [e-mail]