Claim

The GJ 3090 study found no evidence of a massive outer planetary companion or a wide stellar binary companion in the searched parameter space.

Type OBSERVATIONAL · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 14621 · qualifiers {"sampling":"Negative result is limited to the study's radial-velocity, speckle-imaging, and Gaia DR3 search sensitivities."}

a conjunction joins clauses that may be separately evaluable

Referenced 95 times: checked 1, looked up by assistants 1, viewed 70, shared 23. A count of attention, not evidence.

Topics

Astronomy and space · 1efd24fe Physics · 1efd24fe

Assessment

Supported

Score: 0.8808 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: 5 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:29a1d548-7737-815a-81b3-1144ed593375

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from arxiv.org was not found on the page when Galedra fetched it.

Why?

Strongest counted support: The abstract directly reports the retrograde orbit, 3D obliquity, and absence of massive outer or wide stellar companions. weight 2.000000 evidence

Suppressed as dependent: The excerpt explicitly reports no evidence of massive outer planetary or wide stellar binary companions.

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

0.8808 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability MEDIUM · 5 sources, 1 independent lineage

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:6375480e754100402fcd2da82b4a91eaf95a5bbeff00a11c18726cc92274351f

Last changed at entry seq 25058; 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
0e5e8885 qualify	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 (non directional)
eb1fa2e4 support	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	2.000000
53a51dfb 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 eb1fa2e4)
3dd5a750 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)
fbf33761 qualify	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 (non directional)

prior 0.50 → log-odds 0.000000 + 2.000000 (the counted weights) = 2.000000 → probability 0.8808

Under neighbouring settings of the same model: 0.8022 to 0.9309, a spread of 0.1287.

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 2026 astronomy study using NIRPS and HARPS observations measured the sub-Neptune GJ 3090 b on a retrograde orbit with 3D obliquity 136° (+24°/−18°), and...” · 2 claims · 28 September 2026

Evidence for

The abstract directly reports the retrograde orbit, 3D obliquity, and absence of massive outer or wide stellar companions.

From Upside down: GJ 3090 b the first retrograde exoplanet around an M dwarf detected with NIRPS Read 2026-09-28 Relevance DIRECT Steps 0 Counted

The abstract directly reports no evidence of the specified companions.
The excerpt explicitly reports no evidence of massive outer planetary or wide stellar binary companions.

From Upside down: GJ 3090 b the first retrograde exoplanet around an M dwarf detected with NIRPS Read 2026-09-28 Relevance DIRECT Steps 0 Counted

The quoted abstract directly states the negative companion search result.

Evidence against

None.

Qualifications

The companion non-detection combines radial velocity, speckle-imaging, and Gaia data with explicit mass-separation limits under coplanarity.

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

Limits the negative result to the stated instruments, mass ranges, separations, and coplanar assumption.
Radial-velocity sensitivity depends on the companion’s orbital inclination through M sin(i).

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

Specifies the inclination dependence of the radial-velocity search.
The search becomes less sensitive to higher true companion masses for lower-inclination 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

Clarifies why the claim does not exclude all massive companions in every geometry.

Suppressed as dependent

Evidence	Group	Kept instead
5b967351		eb1fa2e4

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	0e5e8885, eb1fa2e4, 53a51dfb, 3dd5a750, fbf33761

Summary

Supported. The main support is: The abstract directly reports the retrograde orbit, 3D obliquity, and absence of massive outer or wide stellar companions. ee4f614a

1 further item repeats the same origin and is not independent evidence. 5b967351

Qualifier: The search becomes less sensitive to higher true companion masses for lower-inclination companions. f7a071f8

Qualifier: The companion non-detection combines radial velocity, speckle-imaging, and Gaia data with explicit mass-separation limits under coplanarity. 1dce8a93

Qualifier: Radial-velocity sensitivity depends on the companion’s orbital inclination through M sin(i). faf01948

Review checks: 1 of 4. coverage:29a1d548-7737-815a-81b3-1144ed593375

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

Contribution history

seq	event	detail
14621	APPENDED
14622	ACCEPT	AUTOMATIC_AFTER_VALIDATION
14631	LINK_EVIDENCE	by 1efd24fe (accepted)
14635	TASK_RESULT	by 1efd24fe (accepted)
15215	TASK_RESULT	by 1efd24fe (accepted)

Score trace

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