Home›Maneuver Tracker›Close Approaches›COSMOS 2386 ⟷ COSMOS 1830
HighProximity
RussiaCOSMOS 2386NORAD 27057 · launched Dec 2001Military payload
4.36kmPredicted miss distance
RussiaCOSMOS 1830NORAD 17585 · launched Mar 1987Military payload
Final forecastFinal forecast, made 14 min before the pass.
Closest approach10 Nov 202619:41 UTC
Relative speed1.02 km/sat the closest approach
Altitude1,406 kmlow Earth orbit
Last confirmed10 Nov19:26 UTC · final forecast
Track COSMOS 2386Track COSMOS 1830All approaches
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RU COSMOS 2386 and RU COSMOS 1830 were predicted to reach a closest approach of 4.36 km at 2026-11-10 19:41 UTC, at a relative speed of 1.02 km/s. Final forecast, made 14 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 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 2386Payload
NORAD 27057
CountryCIS
Launched2001-12-28
OrbitLEO · 1,415 × 1,417 km
COSPAR2001-058C
Maneuver capableUnknown
Profile →Globe →
COSMOS 1830Payload
NORAD 17585
CountryCIS
Launched1987-03-13
OrbitLEO · 1,405 × 1,411 km
COSPAR1987-026D
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1406 KMISS 420Starlink 550

At 1406 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 2386 ⟷ COSMOS 1830
2026-11-10 19:414.36 km Final forecast1.02 km/s1,406 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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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 UTC4.36 km Forecast10 Nov 19:41 UTC10 Nov 04:55 UTCRe-check
10 Nov 09:32 UTC4.36 km Forecast10 Nov 19:41 UTC9 Nov 23:09 UTCRe-check
9 Nov 21:51 UTC4.35 km Forecast10 Nov 19:41 UTC9 Nov 11:02 UTCRe-check
9 Nov 21:33 UTC4.47 km Forecast10 Nov 19:41 UTC9 Nov 05:09 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
1.92 km11-10 12:57 UTC
COSMOS 2386DELTA 1 DEB
2.17 km11-07 14:06 UTC
COSMOS 2386THORAD DELTA 1 DEB
2.80 km11-09 21:52 UTC
COSMOS 2386COSMOS 342

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 →