Claim

Model ledger-default@0.1.0 ledger-strict@0.1.0 ledger-default@0.2.0 ledger-strict@0.2.0 ledger-default@0.3.0 (default) ledger-strict@0.3.0 Snapshot seq

Topics

Astronomy and space · 1efd24fe

Assessment

Why?

Strongest counted support: The abstract links proton disappearance to magnetic shadowing during the close Mercury flyby. weight 2.000000 evidence

Suppressed as dependent: The excerpt directly reports the 4 September 2024 165-km flyby and proton disappearance related to planetary magnetic shadowing.

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 Leans supported.

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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.

• “During BepiColombo’s 4 September 2024 Mercury flyby at 165 km altitude, the disappearance of energetic protons was associated with magnetic shadowing by the...” · 1 claim · 29 September 2026
• “During BepiColombo’s fourth Mercury flyby at 165 km altitude, SIXS observations found proton disappearance associated with magnetic shadowing and electron...” · 2 claims · 29 September 2026

Evidence for

• The abstract links proton disappearance to magnetic shadowing during the close Mercury flyby.

  From Planetary shielding and surface precipitation of solar energetic particles during BepiColombo’s close Mercury flyby Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The secondary report corroborates that Mercury’s body and weak magnetic field produced particle dropouts consistent with a shielding or shadowing effect during the BepiColombo encounter.

  From BepiColombo Catches Solar Storm Particles Raining on Mercury While Its Magnetosphere Shields the Planet Read 2026-09-29 Relevance STRONG Steps 1 Counted

  Secondary coverage of the same Nature Astronomy study; corroborating report, not an independent flyby dataset.

• The excerpt directly reports the 4 September 2024 165-km flyby and proton disappearance related to planetary magnetic shadowing.

  From Planetary shielding and surface precipitation of solar energetic particles during BepiColombo’s close Mercury flyby Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

• The claim is tied to the fourth Mercury flyby on 4 September 2024, 165 km altitude, using BepiColombo’s SIXS particle observations.

  From Planetary shielding and surface precipitation of solar energetic particles during BepiColombo’s close Mercury flyby Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The magnetic-shadowing interpretation specifically concerns disappearing protons; electron dropouts have a separate wide-loss-cone mechanism.

  From Planetary shielding and surface precipitation of solar energetic particles during BepiColombo’s close Mercury flyby Read 2026-09-29 Relevance DIRECT Steps 0 Counted

• The particle observation occurred during a solar energetic particle event at a weakly magnetized rocky planet.

  From Planetary shielding and surface precipitation of solar energetic particles during BepiColombo’s close Mercury flyby Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Suppressed as dependent

Evidence	Group	Kept instead
fd972186		fa8191e8

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	4ad51c5e, fa8191e8, ae3c8ff8, 4baab24a, 41b4b7c8

Summary

Contribution history

seq	event	detail
19714	APPENDED
19715	ACCEPT	AUTOMATIC_AFTER_VALIDATION
19726	LINK_EVIDENCE	by 1efd24fe (accepted)
19736	LINK_EVIDENCE	by 1efd24fe (accepted)
24788	TASK_RESULT	by 1efd24fe (accepted)
25997	TASK_RESULT	by 1efd24fe (accepted)