Home›Maneuver Tracker›Close Approaches›COSMOS 2528 ⟷ COSMOS 1275 DEB
HighProximity
RussiaCOSMOS 2528NORAD 43657 · launched Oct 2018Military payload
3.27kmPredicted miss distance
RussiaCOSMOS 1275 DEBNORAD 12676 · launched Jun 1981Military debris
Final forecastFinal forecast, made minutes before the pass.
After the passBest estimate, from the orbit data published nearest its time: 3.33 km at 28 Oct 01:45 UTC.
Closest approach28 Oct 202601:45 UTC
Relative speed10.61 km/sat the closest approach
Altitude904 kmlow Earth orbit
Last confirmed28 Oct01:43 UTC · final forecast
Track COSMOS 2528Track COSMOS 1275 DEBAll approaches
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RU COSMOS 2528 and RU COSMOS 1275 DEB were predicted to reach a closest approach of 3.27 km at 2026-10-28 01:45 UTC, at a relative speed of 10.61 km/s. Final forecast, made minutes before the pass. Best estimate after the pass, from the orbit data published nearest its time: 3.33 km at 28 Oct 01:45 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 mattersOne side of this pass cannot maneuver, so any avoidance decision rests with the other operator. Screening continues as new element sets arrive.

The Two Objects

Dossiers from the satellite directory
COSMOS 2528Payload
NORAD 43657
CountryCIS
Launched2018-10-25
OrbitLEO · 900 × 910 km
COSPAR2018-082A
Maneuver capableUnknown
Profile →Globe →
COSMOS 1275 DEBDebris
NORAD 12676
CountryCIS
Launched1981-06-04
OrbitLEO · 907 × 972 km
COSPAR1981-053AG
Maneuver capableNo
Uncontrolled debris fragment tracked by the public catalogue. About space debris →
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 904 KMISS 420Starlink 550

At 904 km this pass sits inside the most congested band in low Earth orbit, home to the debris left by the 2007 ASAT test and the 2009 collision. 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 2528 ⟷ COSMOS 1275 DEB
2026-10-28 01:453.27 km Final forecast10.61 km/s904 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
31 Oct 20:56 UTC3.33 km Best estimate28 Oct 01:45 UTC27 Oct 21:55 UTCBest estimate
27 Oct 13:10 UTC3.28 km Forecast28 Oct 01:45 UTC27 Oct 04:44 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
904 m11-02 06:07 UTC
COSMOS 2528OBJECT D
3.71 km11-03 12:11 UTC
COSMOS 2528COSMOS 1304
4.57 km10-27 20:35 UTC
COSMOS 2565COSMOS 1275 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 →