A Planet Nine Candidate from Scale Relativity Predictions and Multi-Wavelength Archival Survey Cross-Matching

We present a Planet Nine candidate identified through a novel methodology combining the scale-relativistic quantization of planetary orbits with multi-epoch far-infrared survey cross-matching. Fitting the macroscopic quantization law a = K_a·n² to the semi-major axes of Jupiter through Neptune (n = 3–6) yields K_a = 1.191 ± 0.086 AU with R² = 0.9998, predicting a trans-Neptunian planet at a = 386–430 AU for n = 18–19. A shifted cross-match of IRAS (1983) and AKARI (2006) reveals a top candidate (score 86.1/100) at (α,δ) = (99.968°, +3.190°), d ≈ 595 AU. Multi-wavelength follow-up across twelve databases shows: (i) a CatWISE2020 source at 2.2″ with W1-W2 = 1.55, μ ≈ 0.2 mas/yr; (ii) thermal emission peaking at 140 μm (AKARI FIS: F140 = 1.82 Jy), T ≈ 21 K — nearly twice the equilibrium temperature (Teq = 11.4 K), consistent with internal heating; (iii) three Gaia DR3 sources within 30″ with zero proper motion; (iv) nine stationary Pan-STARRS1 detections; and (v) dynamical resonance matches with Sedna (13:9, Δϖ = 175.5°) and 2015 RX245 (23:18, Δϖ = 153.7°). Foreground contamination is excluded. The candidate's physical properties (H_V ≈ -6.7, D ≈ 94,000 km for p_V = 0.1) are consistent with a ∼5 M🜨 ice giant. Orbital elements, 2026–2027 ephemerides, and observing strategies for Rubin, Subaru/HSC, and Gemini are provided.