Tools chosen: polymarket_direct polymarket_related kalshi_related claude_news gdelt_news wikipedia code_execution

Sub-questions (Fermi decomposition)

Planner reasoning

This is essentially a pure base-rate question: how often does the CNEOS fireball catalog record a bolide with impact energy ≥10 kt in a given calendar year? The Polymarket price is the anchor; historical CNEOS data (1988–2025) gives the Poisson rate, and news/catalog checks confirm whether any 2026 event has already occurred or whether detection/reporting policy (e.g., the 2022 DoD data-sharing interruption) has changed.

# Current state As of the latest available news (mid-August 2026), no ≥10kt natural bolide/fireball event has been publicly confirmed in the NASA JPL CNEOS database or via ESA/IAWN for calendar year 2026. Roughly 7.5 of 12 months have elapsed with no qualifying event reported (only smaller fireballs, e.g., a Washington state fireball on 2026-08-16 and a Java boom on 2026-07-13, both apparently sub-threshold). # Timeline of key events - 2013-02-15 (confirmed): Chelyabinsk superbolide, 440 kt — largest CNEOS-recorded event. - 2018-12-18 (confirmed): Bering Sea/Kamchatka bolide, 173 kt — second-largest on record. - 2020-12-22/23 (confirmed): China bolide, 9.5 kt — narrowly missed 10kt threshold. - 2022-03 (confirmed): 2022 EB5 impact, ~2-3 kt, discovered ~2hr pre-impact — well below threshold. - 2023-05-20 (confirmed): Queensland, Australia bolide, 7.2 kt. - 2024-01-21 (confirmed): 2024 BX1 over Berlin, small (~kg-scale), sub-kt, discovered pre-impact. - 2024-07-20 (confirmed): Eastern Antarctica bolide, 5.1 kt — strongest since May 2023. - 2026-06-05 (reported): Third-party CNEOS scraper confirms live API pipeline still active/updating into mid-2026. - 2026-07-13 (reported): Meteor boom over Java (Indonesia), magnitude/energy not specified, likely minor. - 2026-08-14/16 (reported): Fireball over Washington State, US — no energy figure reported, likely minor local event. - No ≥10kt event reported for 2026 through mid-August 2026 (absence confirmed by news/database silence). # Event Will a natural meteoroid/bolide explode in Earth's atmosphere with impact energy ≥10 kilotons TNT-equivalent at any point during calendar year 2026, per NASA JPL CNEOS data (or consensus fallback sources)? # Outcomes to forecast - Yes (≥10kt event occurs in 2026) - No (no such event occurs) # Kalshi market anchor No Kalshi-direct price was returned in research (kalshi_related search found 0 matches). Best available cross-market proxy: **Polymarket YES price = 15.0%**, up +4pp (7d) and +5.5pp (30d), range 8.5%–17% over 90 days, volume $186,312. This should be treated as an imperfect proxy for Kalshi consensus, not a direct anchor — flagged as a research gap. # Sub-question answers 1. **Polymarket YES price/volume?** — 15.0% current, trending up (+4pp/7d, +5.5pp/30d), $186k total volume, range 8.5–17% over 90 days. [polymarket_direct] 2. **Historical ≥10kt bolide rate 1988–2025?** — Only 2 unambiguous ≥10kt events in the 38-year CNEOS record: Chelyabinsk (2013, 440kt) and Bering Sea (2018, 173kt); a 2020 China event hit 9.5kt (near-miss). Implied long-run λ≈0.16–0.32/yr; recent-era (2010-2025) λ≈0.25–0.50/yr reflecting improved detection. [claude_news, code_execution] 3. **Any 2026 ≥10kt event recorded/pending?** — No; no search results or news indicate any 2026 fireball reaching 10kt as of mid-August 2026. Minor fireballs reported (Washington, Java) with no energy data suggesting sub-threshold. [claude_news, gdelt_news] 4. **Is CNEOS still updating with US Gov sensor data?** — Yes, a live scraper tool confirms the CNEOS API was actively pulling fresh data as of 2026-06-05, indicating no reporting suspension has been identified. [claude_news] 5. **Known predicted 2026 impacts ≥10kt?** — None found; no ESA/CNEOS Sentry risk-list objects with 2026 impact dates ≥10kt identified in research. Most newly-discovered impactors (e.g., 2024 BX1, 2022 EB5) are small, sub-kt to low-kt objects discovered hours before impact — historically none has approached 10kt. [wikipedia, claude_news] 6. **Poisson-implied probability vs market price?** — Blended central estimate λ≈0.30/yr → P(≥1 event)≈26.4%, with a plausible range 14.6%–39.3% depending on λ assumptions. This is notably higher than the Polymarket 15% price, especially before accounting for elapsed-year discount. [code_execution] # Key facts (high-confidence, factual) 1. [claude_news/Wikipedia] Only 2 clear ≥10kt CNEOS-recorded events since 1988: Chelyabinsk (2013, 440kt) and Bering Sea (2018, 173kt). 2. [claude_news] 2020 China bolide measured 9.5kt — closest recent near-miss. 3. [claude_news] All 2022-2024 recorded events fell well below 10kt (2-7.2kt range). 4. [claude_news] CNEOS pipeline confirmed active/updating as of June 2026. 5. [gdelt_news] No 2026 fireball energy data ≥10kt reported through mid-August 2026. 6. [code_execution] Poisson base-rate models give P(≥1 event/yr) ≈15-39%, central estimate ~21-31%. # Cross-market signals - Kalshi related: No matching Kalshi markets found; no direct Kalshi price available in research (gap). - Polymarket: 15.0% YES, rising trend (+4pp/7d), moderate volume ($186k) — treat as closest available market proxy. - Sportsbook implied: N/A (not applicable to this event type). # Analyst opinions and speculation - claude_news synthesis estimates base rate ~5-7% annually using naive 38-year/2-event frequency, but Poisson code_execution model (accounting for exposure/detection-rate improvements) argues true λ is higher, giving 20-33% central range — a meaningful divergence between simple frequency counting and Poisson modeling with detection-bias adjustment. - code_execution explicitly flags that market prices "well below ~20%" may underestimate risk, given improving all-sky camera/GLM satellite detection networks lowering the threshold for a qualifying event to be documented. # Directional lean per outcome - **Yes**: Improving detection infrastructure (all-sky camera networks, GLM satellites) plausibly raises effective λ above pure historical average; near-miss precedent (9.5kt in 2020) shows sub-10kt events are common and could tip over threshold; full year remains (as of research timestamp) still substantially unelapsed. - **No**: Historical base rate is genuinely low (2 confirmed events in 38 years); no known predicted impactor for 2026; ~7.5 months already elapsed in 2026 with zero qualifying events recorded, mechanically lowering remaining-year probability (e.g., ~14% remaining at λ=0.30, f=0.5). # Gaps / unknowns - No Kalshi-direct price was retrieved — analysis relies on Polymarket as an imperfect proxy; true Kalshi consensus unconfirmed. - Precise current elapsed-time fraction of 2026 unclear relative to research cutoff (news dated through Aug 2026, but unclear if this is "today" for forecasting purposes). - CNEOS reporting lag/classification delays mean a real 2026 event could exist but not yet be logged. - Exact count of ≥10kt CNEOS events historically is disputed across sources (2 clear cases vs. broader "6-12" estimates in code_execution's Poisson model) — reconciled toward the stricter 2-event structural fact (Chelyabinsk, Bering Sea) as primary source-confirmed data. # Calibration anchors - Polymarket YES price (proxy anchor): 15.0%, trending upward. - Poisson base-rate central estimate: ~21-31% (long-run λ 0.16-0.32, recent-era λ 0.25-0.50). - Structural historical fact: 2 confirmed ≥10kt events in 38 years (1988-2025) = ~5.3% naive annual frequency, but with likely under-detection bias adjustment.

1. Both forecasts correctly discount for elapsed time, but neither shows explicit arithmetic reconciling the brief's own remaining-year math: "e.g., ~14% remaining at λ=0.30, f=0.5" implies with ~7.5/12 elapsed (f≈0.625 remaining fraction is actually 0.375, not 0.5) the remaining-year probability should be closer to 1-exp(-0.30*0.375)≈10.6%, meaning Forecast 1's 9% is well-aligned but Forecast 2's 13% sits above even the brief's own point estimate without justifying why. 2. Both forecasts anchor heavily on the naive 2-event/38-year structural fact, but the brief explicitly flags this as likely biased low due to "improving all-sky camera/GLM satellite detection networks lowering the threshold for a qualifying event to be documented" — neither forecast substantively engages with how much detection improvements since 2018 might elevate λ beyond the "recent-era λ≈0.25-0.50" range already used, likely underweighting tail-risk from better sensors catching smaller/more numerous qualifying events. 3. Neither forecaster addresses the CNEOS reporting-lag risk in depth despite the brief's explicit gap: "a real 2026 event could exist but not yet be logged" — this is a nontrivial source of "Yes" upside independent of future-occurrence base rates, since a qualifying event could have already happened but not yet been classified/confirmed, and both treat it as a minor footnote rather than a distinct probability contributor. 4. There's an unaddressed inconsistency: the Polymarket proxy is described as "rising, +4pp/7d, +5.5pp/30d" even as the year elapses without an event — this counterintuitive upward trend (which should mechanically decay as more zero-event months pass) is not explained by either forecaster and could signal information the models are missing (e.g., market participants pricing in detection-lag risk or an unreported pending event). 5. Both converge suspiciously close together (9% and 13%) despite the brief presenting a wide plausible range (14.6%–39.3% unconditional, per Poisson blend) — neither forecast explores the upper tail scenario where λ is genuinely elevated (e.g., λ=0.5 recent-era estimate), which would still yield a remaining-year probability near 17-18%, undercutting confidence that both landed in the right ballpark rather than anchoring too tightly to the low end of the historical range. 6. Neither forecast substantively grapples with the disputed count in the gaps section — "2 clear cases vs. broader '6-12' estimates in code_execution's Poisson model" — simply defaulting to the stricter 2-event count without acknowledging that if intermediate/regional detection sources count more events, the true λ could be meaningfully higher than either forecast's implicit assumption.

12% (65% confidence)

Yes: 12% No: 88%

With ~7.5 of 12 months of 2026 elapsed and no confirmed ≥10kt CNEOS/IAWN event, only the remaining ~37.5% of the year is at risk: at plausible λ of 0.25–0.50/yr this gives 9–17% remaining-year probability, centering near 12%. The critique is fair that Forecast 1 anchors too tightly to the low-λ end while ignoring both detection-improvement upside and the CNEOS classification-lag channel (an already-occurred but unlogged 2026 event), so I nudge slightly above the midpoint of the two forecasts. The Polymarket proxy at 15% and rising is an imperfect anchor with modest volume and typical longshot premium, but its upward drift despite elapsing zero-event months argues against going much below 10%. Net: ~11.5% Yes, just under the proxy price and consistent with elapsed-time-discounted Poisson math across a range of λ assumptions.

Total pipeline time: 228.1s