Cross-Scale Structure in the Thermo-Temporal Quantity κ = τT

We report the observation of a structured thermo-temporal quantity defined as κ = τT (time × temperature) across multiple physical domains, including quantum, atomic, biological, stellar, and cosmological systems. Using publicly available datasets (e.g., Planck CMB measurements and local H₀ observations), κ is evaluated over approximately 70 orders of magnitude. While absolute values vary significantly, the values exhibit non-random clustering and consistent ordering across logarithmic scale. To enable cross-domain comparison, quantities are normalized to a cosmological baseline (κ₀), yielding a dimensionless representation. This reveals a coherent structural pattern that motivates the introduction of a conjugate parameter λ, allowing the system to be expressed in the form κλ ≈ constant. This work presents the observation in a minimal, testable form using open data.