Observable detail · GR
BepiColombo MORE \(\beta_{PPN}\) 2028 (forward)
| Prediction / mechanism | \(\beta - 1 = +1.0 \times 10^{-10}\); below current LLR bound (\(<1.1 \times 10^{-4}\)) and far below BepiColombo MORE precision; the \(\gamma\) channel is the discriminator. |
|---|---|
| Measured | LLR bound \(|\beta - 1| < 1.1 \times 10^{-4}\) (Williams 2009); BepiColombo MORE \(\beta\) precision \(\sim 10^{-5}\). |
| Residual / status | OPEN / FORWARD |
| Status | OPEN |
| Source paper | DCT-PPN-01 |
Mechanism
Closed-form \(\beta - 1 = 1/[(2\omega_0+3)(2\omega_0+4)]\) gives \(9.985 \times 10^{-11}\). Below all currently-projected solar-system precision.
Derivation
The derivation chain follows the cluster paper DCT-PPN-01 and reduces to the canonical DCT constants (\(P_0 = 0.851\), \(\omega_0 = 50{,}037\), \(c_{BD} = 138{,}189\), master identity \(2\omega_0 + 3 = c_{BD} \cdot P_0^2 = 100{,}077\)). See the cluster paper for the full multi-line derivation.
Methodology
| Domain | Solar-system / strong-gravity (GR) |
|---|---|
| Input data source | See "References" below for the canonical public-archive citation. |
| Measurement procedure | The measured value used here is the most recent peer-reviewed central value plus 1σ uncertainty from the cited reference. |
| Acceptance threshold | HIT: residual within 1σ of measurement. SOFT: directional agreement 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 verdict pill above. |
Python verification
Verification script: gravity_tests.py. Run with python3 gravity_tests.py to reproduce the canonical DCT result against the public-archive measurement source listed below.
Cross-references
Related observables: beta-ppn · llr-beta · bepicolombo-more-gamma.
Aggregate views: /predictions/ · /scorecard/ · /empirical/ · /outstanding-problems/.
Audit notes
This sub-page is part of the post-build-out of the observable archive (see the observable index). Verdict reflects the corpus-canonical (constant-\(P_0\)) treatment. The cluster-paper deep-link above (DCT-PPN-01) is the canonical source of the derivation chain.
References
- Williams et al. 2009 — LLR
- Iess et al. 2021 — BepiColombo MORE
- Source paper: DCT-PPN-01
Back to all observables or the predictions table.