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BEACON

Object

2011 UD21

2011UD21 · 2/3 sources · cross-match · 2 risk div.

Risk scales

TorinoT0
Palermo-6.97

Source: JPL Sentry

JPL window: 2105-2116·Last obs: 2011-11-24

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
Cumulative impact probabilitythreshold: >2× (floor 1e-7)1.563e-52.490e-6
Palermo Scalecumulativethreshold: |Δ| > 0.5-6.97-7.74
Torino Scalemaxthreshold: exactT0T0
Estimated diameter* from absolute magnitude7 m7 m *

Detected · 2 fields · 2 risk

  • cumulativeImpactProbability [risk · >2× (floor 1e-7)] · jpl-sentry=0.0000156348 · esa-neocc=0.00000249
  • palermoScaleCumulative [risk · |Δ| > 0.5] · jpl-sentry=-6.97 · esa-neocc=-7.74