Home›Maneuver Tracker›Close Approaches›COSMOS 2484 ⟷ SL-14 DEB
HighProximity
RussiaCOSMOS 2484NORAD 39059 · launched Jan 2013Military payload
2.89kmPredicted miss distance
RussiaSL-14 DEBNORAD 27804 · launched Sep 1991Debris
Final forecastFinal forecast, made 12 min before the pass.
Closest approach11 Nov 202605:38 UTC
Relative speed13.79 km/sat the closest approach
Altitude1,474 kmlow Earth orbit
Last confirmed11 Nov05:26 UTC · final forecast
Track COSMOS 2484Track SL-14 DEBAll approaches
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RU COSMOS 2484 and RU SL-14 DEB were predicted to reach a closest approach of 2.89 km at 2026-11-11 05:38 UTC, at a relative speed of 13.79 km/s. Final forecast, made 12 min 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 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 2484Payload
NORAD 39059
CountryCIS
Launched2013-01-15
OrbitLEO · 1,473 × 1,515 km
COSPAR2013-001C
Maneuver capableUnknown
Profile →Globe →
SL-14 DEBDebris
NORAD 27804
CountryCIS
Launched1991-09-28
OrbitLEO · 1,062 × 1,606 km
COSPAR1991-068AR
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 · 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 2484 ⟷ SL-14 DEB
2026-11-11 05:382.89 km Final forecast13.79 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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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
10 Nov 14:28 UTC2.89 km Forecast11 Nov 05:38 UTC10 Nov 05:48 UTCRe-check
10 Nov 09:38 UTC2.86 km Forecast11 Nov 05:38 UTC9 Nov 22:04 UTCRe-check
10 Nov 09:32 UTC8.29 km Forecast11 Nov 05:38 UTC9 Nov 22:04 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
1.07 km11-14 00:03 UTC
COSMOS 2484DELTA 1 DEB
2.96 km11-08 06:03 UTC
COSMOS 2484COSMOS 1292
5.34 km11-14 05:41 UTC
COSMOS 2484DELTA 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 →