CJ-4455 · COSMOS 1408 DEB
OG-4 Sentinel-B vs NORAD 49271 — debris
Probability of collision8.0×10−6
Time to closest approachT−58:24:00
Decision window2d 2h
Miss distance3.420km
Statenominalfalling
Screening campaign
7 CDMs · ±1σ band
Encounter geometry
Radial1.140km
In-track3.190km
Cross-track0.620km
Relative velocity11.38km/s
Record
- Primary
- OG-4 Sentinel-B
- Secondary
- 49271
- Screening source
- ESA SST
- Last CDM
- 3h 34m ago
- CDMs received
- 7
- TCA (UTC)
- 2026-08-04 00:56:00Z
- Decision deadline
- 2026-08-03 16:32:00Z
- Secondary RCS
- 0.011 m²
- Current ±1σ
- 0.73 decades
Maneuver planner
2 downstream
Proposed burnOG-4 · Sentinel-B
Delta-v0.07m/s
Propellant0.001kg
Axiscross-track
Burn duration1328s
- Execute
- 2026-08-03 13:32:00Z
- Upload pass
- Punta Arenas (PA-2) · T−46:12:00
Effect on CJ-4455
Pc now8.0×10−6
Pc after3.8×10−8
Miss now3.420km
Miss after7.020km
Station-keeping budget7.1 yr runway
3.659 kg after burnreserve 0.8 · capacity 5.0 kg
Downstream conjunctions2 affected
- COSMOS 1408 DEBresolvedCJ-4455 · T+58.4h9.3×10−63.8×10−8
- FENGYUN 1C DEBcreatedCJ-4498 · T+71.1h—1.2×10−6
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