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BEACON

Object

2021 XX4

2021XX4 · 2/3 sources · cross-match

Risk scales

TorinoT0
Palermo-7.59

Source: JPL Sentry

JPL window: 2105-2120·ESA years: 2107-2125·Last obs: 2021-12-10

Sources

Amber = past cut. Risk 0 · fields 0.

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)—2105-21202107-2125
Cumulative impact probabilitythreshold: >2× (floor 1e-7)—2.225e-61.860e-6
Palermo Scalecumulativethreshold: |Δ| > 0.5—-7.59-7.57
Torino Scalemaxthreshold: exact—T0T0
Estimated diameter* from absolute magnitude—7 m7 m *