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BEACON

Object

2017 AA21

2017AA21 · 2/3 sources · cross-match · 1 risk div.

Risk scales

TorinoT0
Palermo-7.30

Source: JPL Sentry

JPL window: 2042-2119·ESA years: 2030-2098·Last obs: 2017-01-04

Sources

Amber = past cut. Risk 1 · fields 1.

2/3 sources · match
FieldJPL CADnot presentJPL SentryNASA/JPLESA NEOCCESA Aegis
Close-approach datethreshold: date———
Miss distanceauthreshold: 3% rel———
Relative velocitykm/sthreshold: 1% rel (ESA 0.1 km/s)———
Risk yearsaggregation windows differ (informational)—2042-21192030-2098
Cumulative impact probabilitythreshold: >2× (floor 1e-7)—2.203e-74.360e-7
Palermo Scalecumulativethreshold: |Δ| > 0.5—-7.30-6.05
Torino Scalemaxthreshold: exact—T0T0
Estimated diameter* from absolute magnitude—20 m21 m *

Detected · 1 fields · 1 risk

  • palermoScaleCumulative [risk · |Δ| > 0.5] · jpl-sentry=-7.3 · esa-neocc=-6.05Aggregation windows differ (informational): JPL 2042-2119 vs ESA 2030-2098. Cumulative threshold still applies.