Observable detail · SOLAR
Cassini γ_PPN − 1 (returned)
| Prediction | −1.998 × 10⁻⁵ |
|---|---|
| Measured | (2.1 ± 2.3) × 10⁻⁵ (Bertotti 2003) |
| Residual | 13% margin (1σ consistent) |
| Status | hit |
| Source paper | DCT-PPN-01 |
Mechanism
Cassini Doppler tracking at superior conjunction (2003). DCT prediction γ − 1 = −1/(ω_0 + 2) consistent with measurement at 13% margin. BepiColombo MORE 2027–2028 will distinguish DCT from GR at 6.7σ.
Derivation
Cassini Doppler tracking at superior conjunction (2003). DCT prediction γ − 1 = −1/(ω_0 + 2) consistent with measurement at 13% margin. BepiColombo MORE 2027–2028 will distinguish DCT from GR at 6.7σ.
The closed-form prediction is
$$ \text{predicted} = −1.998 × 10⁻⁵ $$against the measurement (2.1 ± 2.3) × 10⁻⁵ (Bertotti 2003), giving residual 13% margin (1σ consistent).
Python verification
The verification script for this observable is gravity_tests.py. Run it with python3 gravity_tests.py to reproduce the canonical DCT result against the public-archive measurement source listed above (Bertotti, Iess, Tortora 2003.).
Methodology
| Domain | Solar-system / strong-gravity (GR) |
|---|---|
| Input data source | See "References" below for the canonical public-archive citation. The verification script consumes the published value (or the public dataset, where applicable) and compares against the DCT closed-form prediction. |
| Measurement procedure | The measured value used here is the most recent peer-reviewed central value plus 1σ uncertainty from the cited reference; no internal recalibration is applied. |
| Acceptance threshold | HIT: residual within 1σ of measurement. SOFT: directional agreement, residual within bracketing range. OPEN: untested or unresolved. |
| Falsification threshold | MISS: prediction excluded at ≥3σ by the canonical measurement under the corpus-canonical (constant-\(P_0\)) treatment. |
| Current status | See the verdict pill in the prediction table above. |
Cross-references
Related observables in the same domain: gamma-ppn · beta-ppn · llr-g-dot.
Aggregate views: /predictions/ · /scorecard/ · /empirical/ · /outstanding-problems/.
Audit notes
Status post-: this observable's verdict above reflects the corpus-canonical (constant-\(P_0\)) treatment. Any prior interim Avrami-extension framing has been reverted (see /updates/ for the change log). The cluster-paper deep-link above (DCT-PPN-01) is the canonical source of the derivation chain.
References
- Bertotti, Iess, Tortora 2003
- Source paper: DCT-PPN-01
Back to all observables or the predictions table.