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MediumProximity
RussiaCOSMOS 2587NORAD 63290 · launched Mar 2025Military payload
6.18kmPredicted miss distance
RussiaCOSMOS 1160NORAD 11695 · launched Feb 1980Military payload
Final forecastFinal forecast, made minutes before the pass.
After the passBest estimate, from the orbit data published nearest its time: 6.14 km at 1 Nov 21:52 UTC.
Closest approach1 Nov 202621:52 UTC
Relative speed12.11 km/sat the closest approach
Altitude1,474 kmlow Earth orbit
Last confirmed1 Nov21:47 UTC · final forecast
Track COSMOS 2587Track COSMOS 1160All approaches
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RU COSMOS 2587 and RU COSMOS 1160 were predicted to reach a closest approach of 6.18 km at 2026-11-01 21:52 UTC, at a relative speed of 12.11 km/s. Final forecast, made minutes before the pass. Best estimate after the pass, from the orbit data published nearest its time: 6.14 km at 1 Nov 21:52 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 2587Payload
NORAD 63290
CountryCIS
Launched2025-03-16
OrbitLEO · 1,482 × 1,507 km
COSPAR2025-054C
Maneuver capableUnknown
Profile →Globe →
COSMOS 1160Payload
NORAD 11695
CountryCIS
Launched1980-02-11
OrbitLEO · 1,464 × 1,483 km
COSPAR1980-012E
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1474 KMISS 420Starlink 550

At 1474 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 2587 ⟷ COSMOS 1160
2026-11-01 21:526.18 km Final forecast12.11 km/s1,474 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 21:51 UTC6.14 km Best estimate1 Nov 21:52 UTC2 Nov 05:49 UTCBest estimate
1 Nov 18:48 UTC6.18 km Forecast1 Nov 21:52 UTC1 Nov 06:18 UTCRe-check
1 Nov 17:59 UTC6.18 km Forecast1 Nov 21:52 UTC1 Nov 04:20 UTCRe-check
1 Nov 17:40 UTC8.28 km Forecast1 Nov 21:52 UTC1 Nov 04:20 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
2.42 km11-03 15:35 UTC
COSMOS 2587DELTA 1 DEB
3.11 km10-31 21:36 UTC
COSMOS 2012COSMOS 1160
3.79 km10-31 14:04 UTC
COSMOS 2587COSMOS 2143 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 →