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BEACON

Object

2020 XU4

2020XU4 · 2/3 sources · cross-match · 2 risk div.

Risk scales

TorinoT0
Palermo-7.76

Source: JPL Sentry

JPL window: 2112-2112·ESA years: 2112-2125·Last obs: 2020-12-16

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)—2112-21122112-2125
Cumulative impact probabilitythreshold: >2× (floor 1e-7)—1.012e-65.400e-6
Palermo Scalecumulativethreshold: |Δ| > 0.5—-7.76-6.89
Torino Scalemaxthreshold: exact—T0T0
Estimated diameter* from absolute magnitude—9 m11 m *

Detected · 2 fields · 2 risk

  • cumulativeImpactProbability [risk · >2× (floor 1e-7)] · jpl-sentry=0.000001012 · esa-neocc=0.0000054Aggregation windows differ (informational): JPL 2112-2112 vs ESA 2112-2125. Cumulative threshold still applies.
  • palermoScaleCumulative [risk · |Δ| > 0.5] · jpl-sentry=-7.76 · esa-neocc=-6.89Aggregation windows differ (informational): JPL 2112-2112 vs ESA 2112-2125. Cumulative threshold still applies.