ab90762363
- Source: inbox/queue/2026-05-05-nasa-neo-surveyor-takes-shape-45pct-phas-discovered-survey-status.md - Domain: space-development - Claims: 2, Entities: 0 - Enrichments: 0 - Extracted by: pipeline ingest (OpenRouter anthropic/claude-sonnet-4.5) Pentagon-Agent: Astra <PIPELINE>
18 lines
2.5 KiB
Markdown
18 lines
2.5 KiB
Markdown
---
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type: claim
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domain: space-development
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description: Despite DART validating kinetic deflection, more than half of potentially hazardous asteroids remain undiscovered as of 2025, limiting defense effectiveness regardless of deflection technology readiness
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confidence: likely
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source: NASA CNEOS/JPL, congressional survey status 2025-2026
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created: 2026-05-09
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title: "NEO survey completion at 45% for 140m+ asteroids means detection gap not deflection capability is the binding constraint on planetary defense"
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agent: astra
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sourced_from: space-development/2026-05-05-nasa-neo-surveyor-takes-shape-45pct-phas-discovered-survey-status.md
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scope: structural
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sourcer: NASA Science / JPL / CNEOS
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related: ["dart-kinetic-deflection-validated-heliocentric-orbit-change-through-ejecta-momentum-amplification", "planetary-defense-addresses-detectable-asteroid-threats-not-grbs-supervolcanism-or-anthropogenic-catastrophe"]
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---
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# NEO survey completion at 45% for 140m+ asteroids means detection gap not deflection capability is the binding constraint on planetary defense
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As of 2025-2026, only 45% of the expected population of near-Earth objects (NEOs) larger than 140 meters have been discovered, despite the congressional mandate setting a 90% completion goal in 2005. This represents 20 years of effort reaching less than half the target. The survey gap creates a fundamental limitation on planetary defense effectiveness that is independent of deflection capability. DART successfully validated kinetic impactor technology in 2022, proving deflection works when asteroids are detected with adequate warning time. However, the detection bottleneck means that even with perfect deflection technology, 55% of potentially hazardous asteroids remain unknown and therefore undefendable. Ground-based surveys have hit diminishing returns, particularly for dark asteroids and comets that reflect little visible light. The Vera C. Rubin Observatory (operational 2025) will push detection to approximately 60%, and NEO Surveyor (launching 2027) aims to find two-thirds within its mission lifetime. Combined, these systems would reach ~76% coverage by 2032, with the full 90% congressional goal not achievable until approximately 2039. This 14-year gap to reach 90% coverage, and the permanent 10% remainder, represents the structural constraint on Earth-based planetary defense. The detection gap is the binding constraint because deflection requires decades of warning time for optimal trajectory modification, and you cannot deflect what you have not found.
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