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BEACON

Object

2021 XV4

2021XV4 · 2/3 sources · cross-match · 2 risk div.

Risk scales

TorinoT0
Palermo-7.94

Source: JPL Sentry

JPL window: 2090-2103·ESA years: 2068-2103·Last obs: 2021-12-09

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)—2090-21032068-2103
Cumulative impact probabilitythreshold: >2× (floor 1e-7)—5.061e-71.120e-7
Palermo Scalecumulativethreshold: |Δ| > 0.5—-7.94-8.49
Torino Scalemaxthreshold: exact—T0T0
Estimated diameter* from absolute magnitude—7 m7 m *

Detected · 2 fields · 2 risk

  • cumulativeImpactProbability [risk · >2× (floor 1e-7)] · jpl-sentry=5.061e-7 · esa-neocc=1.12e-7Aggregation windows differ (informational): JPL 2090-2103 vs ESA 2068-2103. Cumulative threshold still applies.
  • palermoScaleCumulative [risk · |Δ| > 0.5] · jpl-sentry=-7.94 · esa-neocc=-8.49Aggregation windows differ (informational): JPL 2090-2103 vs ESA 2068-2103. Cumulative threshold still applies.