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BEACON

Object

2021 WR4

2021WR4 · 2/3 sources · cross-match · 2 risk div.

Risk scales

TorinoT0
Palermo-9.01

Source: JPL Sentry

JPL window: 2064-2120·ESA years: 2098-2098·Last obs: 2021-12-02

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)2064-21202098-2098
Cumulative impact probabilitythreshold: >2× (floor 1e-7)9.634e-71.290e-9
Palermo Scalecumulativethreshold: |Δ| > 0.5-9.01-11.87
Torino Scalemaxthreshold: exactT0T0
Estimated diameter* from absolute magnitude3 m3 m *

Detected · 2 fields · 2 risk

  • cumulativeImpactProbability [risk · >2× (floor 1e-7)] · jpl-sentry=9.63395e-7 · esa-neocc=1.29e-9Aggregation windows differ (informational): JPL 2064-2120 vs ESA 2098-2098. Cumulative threshold still applies.
  • palermoScaleCumulative [risk · |Δ| > 0.5] · jpl-sentry=-9.01 · esa-neocc=-11.87Aggregation windows differ (informational): JPL 2064-2120 vs ESA 2098-2098. Cumulative threshold still applies.