Home›Maneuver Tracker›Close Approaches›COSMOS 2040 ⟷ COSMOS 2337
HighProximity
RussiaCOSMOS 2040NORAD 20234 · launched Sep 1989Military payload
3.86kmPredicted miss distance
RussiaCOSMOS 2337NORAD 24725 · launched Feb 1997Military payload
Final forecastFinal forecast, made minutes before the pass.
Closest approach11 Nov 202600:47 UTC
Relative speed4.08 km/sat the closest approach
Altitude1,407 kmlow Earth orbit
Last confirmed11 Nov00:46 UTC · final forecast
Track COSMOS 2040Track COSMOS 2337All approaches
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RU COSMOS 2040 and RU COSMOS 2337 were predicted to reach a closest approach of 3.86 km at 2026-11-11 00:47 UTC, at a relative speed of 4.08 km/s. Final forecast, made minutes before the pass. 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 2040Payload
NORAD 20234
CountryCIS
Launched1989-09-14
OrbitLEO · 1,408 × 1,416 km
COSPAR1989-074C
Maneuver capableUnknown
Profile →Globe →
COSMOS 2337Payload
NORAD 24725
CountryCIS
Launched1997-02-14
OrbitLEO · 1,413 × 1,427 km
COSPAR1997-006A
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1407 KMISS 420Starlink 550

At 1407 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

2 predicted passes under 10 km
Pair history · COSMOS 2040 ⟷ COSMOS 2337
2026-11-11 00:473.86 km Final forecast4.08 km/s1,407 kmShown above
2026-09-19 10:584.91 km Not re-confirmed · after: 4.74 km4.04 km/s1,423 kmView →

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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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 14:28 UTC3.86 km Forecast11 Nov 00:47 UTC10 Nov 03:22 UTCRe-check
10 Nov 10:13 UTC3.87 km Forecast11 Nov 00:47 UTC9 Nov 21:39 UTCRe-check
10 Nov 09:55 UTC5.03 km Forecast11 Nov 00:47 UTC9 Nov 21:39 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
620 m11-12 11:04 UTC
COSMOS 2337SL-14 DEB
929 m11-06 00:04 UTC
COSMOS 1997COSMOS 2040
2.42 km11-12 09:30 UTC
COSMOS 2337SSU 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 →