Not re-confirmedLast re-confirmed by the screening 24 h before the pass. Newer orbit data, from 2 Nov 10:44 UTC, still put the two within 10 km of each other (2.75 km). The most recent pass the screening confirmed up to its time: 1.56 km on 3 Nov 06:34 UTC.
USOTTER 24C and USFLOCK 4J-11 were predicted to reach a closest approach of 2.68 km at 2026-11-03 04:49 UTC, drifting past at about 1.9 m/s (7 km/h) as seen from FLOCK 4J-11. Last re-confirmed by the screening 24 h before the pass. Newer orbit data, from 2 Nov 10:44 UTC, still put the two within 10 km of each other (2.75 km). Miss distance and time of closest approach are computed by propagating the latest published orbital elements for both objects, and each pass is re-checked every 20 minutes as new element sets are published. See the Satellite Maneuver Tracker for the live picture and space situational awareness for context.
Why it mattersBoth objects are catalogued as payloads. Screening continues as new element sets arrive; operators act on their own conjunction data.
At 506 km this pass sits in low Earth orbit. Objects here stay up for decades: there is too little atmospheric drag to clean the band naturally. Why crowded bands matter →
History Between This Pair
6 predicted passes under 10 km
Pair history · OTTER 24C ⟷ FLOCK 4J-11
2026-11-03 08:137.97 km Live forecast0.01 km/s505 kmView →
2026-11-03 07:297.41 km Not re-confirmed0.01 km/s523 kmView →
2026-11-03 06:341.56 km Final forecast0.00 km/s504 kmView →
2026-11-03 05:481.41 km Final forecast0.00 km/s523 kmView →
2026-11-03 04:492.68 km Not re-confirmed0.00 km/s506 kmShown above
2026-11-03 03:049.78 km Final forecast0.01 km/s513 kmView →
Repeat encounters are common for objects in near-intersecting orbital planes. Each pass is re-screened as fresh element sets arrive; "Final forecast" means the screening still predicted it within 45 minutes of its time, "Not re-confirmed" means later screening stopped finding it.
Forecast Record
Every figure published for the pass shown above, newest first. Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.
Computed · figure · predicted time · orbit data · by
2 Nov 04:47 UTC2.68 km Forecast3 Nov 04:49 UTC1 Nov 22:44 UTCRe-check
2 Nov 04:27 UTC3.05 km Forecast3 Nov 04:27 UTC1 Nov 22:44 UTCScreen
2 Nov 04:07 UTC5.13 km Forecast3 Nov 04:07 UTC1 Nov 22:44 UTCScreen
2 Nov 03:47 UTC8.52 km Forecast3 Nov 03:47 UTC1 Nov 22:44 UTCScreen
Miss distance and TCA come from propagating the latest published orbital elements for both objects and searching for the minimum separation over the screening window. Element sets carry kilometre-scale uncertainty, so figures here describe a close pass, not a collision prediction; a change in either object's published elements re-computes the pass automatically. What is a conjunction? →How conjunction assessment works →
Cite this encounter: Orbital Radar — “OTTER 24C ⟷ FLOCK 4J-11: 2.68 km forecast, not re-confirmed”, https://orbitalradar.com/conjunction/100930-101227 (accessed 2026-11-03).
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