Home›Maneuver Tracker›Close Approaches›COSMOS 2303 ⟷ COSMOS 1052
HighProximity
RussiaCOSMOS 2303NORAD 23445 · launched Dec 1994Military payload
3.06kmPredicted miss distance
RussiaCOSMOS 1052NORAD 11129 · launched Dec 1978Military payload
Final forecastFinal forecast, made 19 min before the pass.
After the passBest estimate, from the orbit data published nearest its time: 3.12 km at 6 Nov 16:49 UTC.
Closest approach6 Nov 202616:49 UTC
Relative speed7.59 km/sat the closest approach
Altitude1,421 kmlow Earth orbit
Last confirmed6 Nov16:30 UTC · final forecast
Track COSMOS 2303Track COSMOS 1052All approaches
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RU COSMOS 2303 and RU COSMOS 1052 were predicted to reach a closest approach of 3.06 km at 2026-11-06 16:49 UTC, at a relative speed of 7.59 km/s. Final forecast, made 19 min before the pass. Best estimate after the pass, from the orbit data published nearest its time: 3.12 km at 6 Nov 16:49 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 2303Payload
NORAD 23445
CountryCIS
Launched1994-12-26
OrbitLEO · 1,413 × 1,429 km
COSPAR1994-086E
Maneuver capableUnknown
Profile →Globe →
COSMOS 1052Payload
NORAD 11129
CountryCIS
Launched1978-12-05
OrbitLEO · 1,409 × 1,488 km
COSPAR1978-109B
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1421 KMISS 420Starlink 550

At 1421 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 2303 ⟷ COSMOS 1052
2026-11-06 16:493.06 km Final forecast · after: 3.12 km7.59 km/s1,421 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
10 Nov 15:26 UTC3.12 km Best estimate6 Nov 16:49 UTC6 Nov 14:20 UTCBest estimate
6 Nov 08:55 UTC3.06 km Forecast6 Nov 16:49 UTC5 Nov 20:25 UTCRe-check
5 Nov 17:27 UTC2.97 km Forecast6 Nov 16:49 UTC4 Nov 19:38 UTCRe-check
5 Nov 17:07 UTC5.07 km Forecast6 Nov 16:49 UTC4 Nov 19:38 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
865 m11-07 21:09 UTC
COSMOS 2303COSMOS 1930
2.23 km11-12 05:18 UTC
COSMOS 2303COSMOS 1019
3.66 km11-08 12:09 UTC
COSMOS 2303COSMOS 1831

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 →