Home›Maneuver Tracker›Close Approaches›COSMOS 2337 ⟷ COSMOS 2491 DEB
HighProximity
RussiaCOSMOS 2337NORAD 24725 · launched Feb 1997Military payload
3.48kmPredicted miss distance
RussiaCOSMOS 2491 DEBNORAD 44987 · launched Dec 2013Military debris
Final forecastFinal forecast, made 16 min before the pass.
After the passBest estimate, from the orbit data published nearest its time: 3.50 km at 6 Nov 10:36 UTC. One of the two changed orbit around the time of the pass (a maneuver or strong drag), so this estimate is less certain.
Closest approach6 Nov 202610:36 UTC
Relative speed14.11 km/sat the closest approach
Altitude1,412 kmlow Earth orbit
Last confirmed6 Nov10:20 UTC · final forecast
Track COSMOS 2337Track COSMOS 2491 DEBAll approaches
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RU COSMOS 2337 and RU COSMOS 2491 DEB were predicted to reach a closest approach of 3.48 km at 2026-11-06 10:36 UTC, at a relative speed of 14.11 km/s. Final forecast, made 16 min before the pass. Best estimate after the pass, from the orbit data published nearest its time: 3.50 km at 6 Nov 10:36 UTC. One of the two changed orbit around the time of the pass (a maneuver or strong drag), so this estimate is less certain. 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 2337Payload
NORAD 24725
CountryCIS
Launched1997-02-14
OrbitLEO · 1,413 × 1,427 km
COSPAR1997-006A
Maneuver capableUnknown
Profile →Globe →
COSMOS 2491 DEBDebris
NORAD 44987
CountryCIS
Launched2013-12-25
OrbitLEO · 1,217 × 1,531 km
COSPAR2013-076H
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 · 1412 KMISS 420Starlink 550

At 1412 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 2337 ⟷ COSMOS 2491 DEB
2026-11-06 10:363.48 km Final forecast · after: 3.50 km14.11 km/s1,412 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 06:51 UTC3.50 km Best estimate6 Nov 10:36 UTC6 Nov 15:34 UTCBest estimate
6 Nov 09:41 UTC3.48 km Forecast6 Nov 10:36 UTC5 Nov 16:42 UTCRe-check
6 Nov 09:20 UTC8.58 km Forecast6 Nov 10:36 UTC5 Nov 16:42 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
620 m11-12 11:04 UTC
COSMOS 2337SL-14 DEB
2.42 km11-12 09:30 UTC
COSMOS 2337SSU 1 DEB
3.86 km11-11 00:47 UTC
COSMOS 2040COSMOS 2337

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 →