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BEACON

Object

2021 SY1

2021SY1 · 2/3 sources · cross-match

Close approach

Miss distance sketch — not a real orbit plot.

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JPL CAD
0.045530 au · 17.72 LD
2027-Sep-17 01:32 · 7.41 km/s
ESA NEOCC
0.045530 au · 17.72 LD
2027-09-17 · 7.40 km/s
JPL uncertainty (dist_min–max)
0.045529 0.045530 au

Sources

Amber = past cut. Risk 0 · fields 0.

2/3 sources · match
FieldJPL CADNASA/JPLJPL Sentrynot presentESA NEOCCESA Aegis
Close-approach datethreshold: date2027-Sep-17 01:322027-09-17
Miss distanceauthreshold: 3% rel0.0455300.045530
Relative velocitykm/sthreshold: 1% rel (ESA 0.1 km/s)7.417.40
Risk yearscumulative aggregation window
Cumulative impact probabilitythreshold: >2× (floor 1e-7)
Palermo Scalecumulativethreshold: |Δ| > 0.5
Torino Scalemaxthreshold: exact
Estimated diameter* from absolute magnitude40 m *