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BEACON

Object

2021 AB4

2021AB4 · 2/3 sources · cross-match · 2 risk div.

Risk scales

TorinoT0
Palermo-5.79

Source: JPL Sentry

JPL window: 2078-2117·ESA years: 2091-2117·Last obs: 2021-02-01

Sources

Amber = past cut. Risk 2 · fields 2.

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)—2078-21172091-2117
Cumulative impact probabilitythreshold: >2× (floor 1e-7)—2.538e-56.670e-6
Palermo Scalecumulativethreshold: |Δ| > 0.5—-5.79-6.32
Torino Scalemaxthreshold: exact—T0T0
Estimated diameter* from absolute magnitude—15 m15 m *

Detected · 2 fields · 2 risk

  • cumulativeImpactProbability [risk · >2× (floor 1e-7)] · jpl-sentry=0.0000253843975 · esa-neocc=0.00000667Aggregation windows differ (informational): JPL 2078-2117 vs ESA 2091-2117. Cumulative threshold still applies.
  • palermoScaleCumulative [risk · |Δ| > 0.5] · jpl-sentry=-5.79 · esa-neocc=-6.32Aggregation windows differ (informational): JPL 2078-2117 vs ESA 2091-2117. Cumulative threshold still applies.