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HighProximity
RussiaCOSMOS 2484NORAD 39059 · launched Jan 2013Military payload
1.90kmPredicted miss distance
RussiaCOSMOS 1751NORAD 16761 · launched Jun 1986Military payload
Final forecastFinal forecast, made minutes before the pass.
After the passBest estimate, from the orbit data published nearest its time: 1.88 km at 1 Nov 11:20 UTC.
Closest approach1 Nov 202611:20 UTC
Relative speed13.90 km/sat the closest approach
Altitude1,488 kmlow Earth orbit
Last confirmed1 Nov11:16 UTC · final forecast
Track COSMOS 2484Track COSMOS 1751All approaches
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RU COSMOS 2484 and RU COSMOS 1751 were predicted to reach a closest approach of 1.90 km at 2026-11-01 11:20 UTC, at a relative speed of 13.90 km/s. Final forecast, made minutes before the pass. Best estimate after the pass, from the orbit data published nearest its time: 1.88 km at 1 Nov 11:20 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 2484Payload
NORAD 39059
CountryCIS
Launched2013-01-15
OrbitLEO · 1,473 × 1,515 km
COSPAR2013-001C
Maneuver capableUnknown
Profile →Globe →
COSMOS 1751Payload
NORAD 16761
CountryCIS
Launched1986-06-06
OrbitLEO · 1,466 × 1,506 km
COSPAR1986-042D
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1488 KMISS 420Starlink 550

At 1488 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 2484 ⟷ COSMOS 1751
2026-11-01 11:201.90 km Final forecast13.90 km/s1,488 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
4 Nov 16:12 UTC1.88 km Best estimate1 Nov 11:20 UTC1 Nov 13:09 UTCBest estimate
1 Nov 09:16 UTC1.90 km Forecast1 Nov 11:20 UTC1 Nov 03:30 UTCRe-check
1 Nov 08:16 UTC1.87 km Forecast1 Nov 11:20 UTC31 Oct 12:03 UTCRe-check
1 Nov 07:56 UTC4.83 km Forecast1 Nov 11:20 UTC31 Oct 12:03 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
1.70 km10-31 05:05 UTC
COSMOS 2132COSMOS 1751
5.15 km10-31 07:01 UTC
COSMOS 2484DELTA 1 DEB
5.88 km11-04 14:55 UTC
COSMOS 2484COSMOS 1036

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 →