Home›Maneuver Tracker›Close Approaches›COSMOS 2165 ⟷ COSMOS 2255
MediumProximity
RussiaCOSMOS 2165NORAD 21779 · launched Nov 1991Military payload
6.67kmPredicted miss distance
RussiaCOSMOS 2255NORAD 22690 · launched Jun 1993Military payload
Final forecastFinal forecast, made 15 min before the pass.
After the passBest estimate, from the orbit data published nearest its time: 6.71 km at 5 Nov 04:06 UTC.
Closest approach5 Nov 202604:06 UTC
Drift speed320 m/s1,151 km/h, seen from COSMOS 2255
Altitude1,419 kmlow Earth orbit
Last confirmed5 Nov03:51 UTC · final forecast
Track COSMOS 2165Track COSMOS 2255All approaches
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RU COSMOS 2165 and RU COSMOS 2255 were predicted to reach a closest approach of 6.67 km at 2026-11-05 04:06 UTC, drifting past at about 320 m/s (1,151 km/h) as seen from COSMOS 2255. Final forecast, made 15 min before the pass. Best estimate after the pass, from the orbit data published nearest its time: 6.71 km at 5 Nov 04:06 UTC. 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
COSMOS 2165Payload
NORAD 21779
CountryCIS
Launched1991-11-12
OrbitLEO · 1,394 × 1,411 km
COSPAR1991-077A
Maneuver capableUnknown
Profile →Globe →
COSMOS 2255Payload
NORAD 22690
CountryCIS
Launched1993-06-24
OrbitLEO · 1,404 × 1,414 km
COSPAR1993-038D
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1419 KMISS 420Starlink 550

At 1419 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

1 predicted pass under 10 km
Pair history · COSMOS 2165 ⟷ COSMOS 2255
2026-11-05 04:066.67 km Final forecast · after: 6.71 km0.32 km/s1,419 kmShown above

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
9 Nov 00:52 UTC6.71 km Best estimate5 Nov 04:06 UTC5 Nov 12:20 UTCBest estimate
4 Nov 17:58 UTC6.67 km Forecast5 Nov 04:06 UTC4 Nov 06:43 UTCRe-check
4 Nov 09:33 UTC6.69 km Forecast5 Nov 04:06 UTC4 Nov 00:56 UTCRe-check
4 Nov 04:24 UTC6.68 km Forecast5 Nov 04:06 UTC3 Nov 12:52 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
2.46 km11-12 09:04 UTC
COSMOS 2255TITAN 3D DEB
2.72 km11-07 01:27 UTC
COSMOS 2165GLOBALSTAR M074
4.00 km11-07 07:27 UTC
COSMOS 2165DELTA 1 DEB

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 →