Claim

The study found no evidence of a massive outer planetary companion or wide stellar binary companion to GJ 3090, and reported that this disfavors gravitational-perturbation explanations for the planet’s retrograde orbit.

Type OBSERVATIONAL · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 18069 · qualifiers {"location":"The GJ 3090 multi-planet system.","denominator":"Companion searches using the study’s reported observations and analyses."}

31 words; atomic claims are usually under 25a conjunction joins clauses that may be separately evaluable

Referenced 72 times: checked 1, looked up by assistants 0, viewed 50, shared 21. A count of attention, not evidence.

Topics

Astronomy and space · 1efd24fe

Assessment

Supported

Score: 0.8581 under ledger-default@0.3.0 at snapshot 27745

2 of 4 review checks done · 1 counted · 1 by the author only

1 independent evidence lineage · review checks 1 of 4 · stability MEDIUM

Main unresolved issue: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:74549a1c-be66-8bb7-8b17-25bebc7866bf

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.

Why?

Strongest counted support: The abstract reports no evidence of massive outer or wide stellar companions and the authors’ interpretation of that result. weight 1.800000 evidence

Suppressed as dependent: The quoted abstract directly reports no massive outer planetary or wide stellar binary companions and says this disfavors gravitational-perturbation scenarios.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Unresolved.

Hide calculation

0.8581 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability MEDIUM · 3 sources, 1 independent lineage

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:373772775269ca54494461e7dee0972e4d6cd5da5ce4c19c1041cae6acd2495f

Last changed at entry seq 25393; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
ff744560 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (dependent strongest only, kept f9e4bdcd)
f9e4bdcd support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
d3539679 qualify	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	0.000000 (non directional)

prior 0.50 → log-odds 0.000000 + 1.800000 (the counted weights) = 1.800000 → probability 0.8581

Under neighbouring settings of the same model: 0.7790 to 0.9121, a spread of 0.1331.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“A September 2026 A&A study measured GJ 3090 b’s 3D obliquity at 136° and reported no evidence of a massive outer companion or wide stellar binary.” · 2 claims · 29 September 2026

Evidence for

The abstract reports no evidence of massive outer or wide stellar companions and the authors’ interpretation of that result.

From Upside down: GJ 3090 b the first retrograde exoplanet around an M dwarf detected with NIRPS Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The quoted abstract directly reports no massive outer planetary or wide stellar binary companions and says this disfavors gravitational-perturbation scenarios.

From Upside down: GJ 3090 b the first retrograde exoplanet around an M dwarf detected with NIRPS Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The excerpt explicitly states both the null companion result and its interpretation.

Evidence against

None.

Qualifications

The no-companion result is limited to instrument-specific mass, separation, and inclination parameter space, with weaker limits for non-coplanar companions.

From Upside down: GJ 3090 b the first retrograde exoplanet around an M dwarf detected with NIRPS Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Bounds the null companion result and gravitational-perturbation inference to the searched parameter space.

Suppressed as dependent

Evidence	Group	Kept instead
ef456465		f9e4bdcd

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

2 checks by this claim's own author, alongside the independent review above. 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	ff744560, f9e4bdcd, d3539679

Summary

Supported. The main support is: The abstract reports no evidence of massive outer or wide stellar companions and the authors’ interpretation of that result. a9646823

1 further item repeats the same origin and is not independent evidence. ef456465

Qualifier: The no-companion result is limited to instrument-specific mass, separation, and inclination parameter space, with weaker limits for non-coplanar companions. b8a23135

Review checks: 1 of 4. coverage:74549a1c-be66-8bb7-8b17-25bebc7866bf

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
18069	APPENDED
18070	ACCEPT	AUTOMATIC_AFTER_VALIDATION
18079	LINK_EVIDENCE	by 1efd24fe (accepted)
24458	TASK_RESULT	by 1efd24fe (accepted)
25392	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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  "claim": "74549a1c-be66-8bb7-8b17-25bebc7866bf",
  "links": [
    {
      "kept": "8afff9ae-6801-84cb-a963-197ff9e4bdcd",
      "link": "709565fb-b2ac-8c06-85dd-a0b6ff744560",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "f62a7176-4bae-8a77-9781-28fbef456465",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    },
    {
      "link": "8afff9ae-6801-84cb-a963-197ff9e4bdcd",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "970d7a98-9458-8912-bd3d-4d48a9646823",
      "direction": "SUPPORT",
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      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
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      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.800000",
      "interpretive_steps": 0
    },
    {
      "link": "97a13fae-56de-8ffc-81da-cb47d3539679",
      "group": null,
      "reason": "non_directional",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "f5ea6d0e-ed38-8bc2-8e88-78feb8a23135",
      "direction": "QUALIFY",
      "magnitude": "2.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "MEASUREMENT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
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  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.1331",
    "permissive": "0.9121",
    "conservative": "0.7790"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "MEDIUM",
  "claim_type": "OBSERVATIONAL",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.8581",
  "provisional": true,
  "evidence_sum": "1.800000",
  "snapshot_seq": 25393,
  "prior_log_odds": "0.000000",
  "support_groups": 1,
  "model_dependent": false,
  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "SUPPORTED",
  "review_checklist": {
    "qualifiers_reviewed": {
      "by": [],
      "ok": false
    },
    "opposing_search_done": {
      "by": [],
      "ok": false
    },
    "independence_reviewed": {
      "by": [],
      "ok": false
    },
    "primary_source_reviewed": {
      "by": [
        "709565fb-b2ac-8c06-85dd-a0b6ff744560",
        "8afff9ae-6801-84cb-a963-197ff9e4bdcd",
        "97a13fae-56de-8ffc-81da-cb47d3539679"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "1.800000",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}