Home›Maneuver Tracker›Close Approaches›OTTER 24C ⟷ FLOCK 4J-11
HighProximity
United StatesOTTER 24CNORAD 100930 · launched Oct 2026Payload
1.41kmPredicted miss distance
United StatesFLOCK 4J-11NORAD 101227 · launched Oct 2026Payload
Final forecastFinal forecast, made 19 min before the pass.
Closest approach3 Nov 202605:48 UTC
Drift speed3.3 m/s12 km/h, seen from FLOCK 4J-11
Altitude523 kmlow Earth orbit
Last confirmed3 Nov05:29 UTC · final forecast
Track OTTER 24CTrack FLOCK 4J-11All approaches
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US OTTER 24C and US FLOCK 4J-11 were predicted to reach a closest approach of 1.41 km at 2026-11-03 05:48 UTC, drifting past at about 3.3 m/s (12 km/h) as seen from FLOCK 4J-11. Final forecast, made 19 min before the pass. 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.

The Two Objects

Dossiers from the satellite directory
OTTER 24CPayload
NORAD 100930
CountryUS
Launched2026-10-01
OrbitLEO · 511 × 516 km
COSPAR2026-227AZ
Maneuver capableUnknown
Profile →Globe →
FLOCK 4J-11Payload
NORAD 101227
CountryUS
Launched2026-10-01
OrbitLEO · 511 × 517 km
COSPAR2026-227CZ
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 523 KMISS 420Starlink 550

At 523 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 kmShown above
2026-11-03 04:492.68 km Not re-confirmed0.00 km/s506 kmView →
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
3 Nov 04:49 UTC1.41 km Forecast3 Nov 05:48 UTC3 Nov 00:44 UTCRe-check
2 Nov 17:35 UTC1.54 km Forecast3 Nov 05:42 UTC2 Nov 10:44 UTCRe-check
2 Nov 09:14 UTC1.35 km Forecast3 Nov 05:45 UTC2 Nov 00:06 UTCRe-check
2 Nov 05:47 UTC1.90 km Forecast3 Nov 05:36 UTC1 Nov 22:44 UTCRe-check
2 Nov 05:27 UTC2.31 km Forecast3 Nov 05:27 UTC1 Nov 22:44 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
948 m11-04 04:44 UTC
OTTER 24COBJECT CE
2.40 km10-28 11:36 UTC
OTTER 24CFLOCK 4J-10
2.65 km10-28 23:32 UTC
OTTER 24CION SCV-026

How These Numbers Are Computed

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: 1.41 km predicted close approach”, https://orbitalradar.com/conjunction/100930-101227 (accessed 2026-11-03).