Home›Maneuver Tracker›Close Approaches›COSMOS 2125 ⟷ COSMOS 1796
HighProximity
RussiaCOSMOS 2125NORAD 21100 · launched Feb 1991Military payload
4.80kmPredicted miss distance
RussiaCOSMOS 1796NORAD 17140 · launched Nov 1986Military payload
Live forecastConfirmed by the latest screening, 10 Nov 00:52 UTC.
Closest approach10 Nov 202610:24 UTC
Relative speed1.05 km/sat the closest approach
Altitude1,466 kmlow Earth orbit
Separation now—live
Track COSMOS 2125Track COSMOS 1796All approaches
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RU COSMOS 2125 and RU COSMOS 1796 are predicted to reach a closest approach of 4.80 km at 2026-11-10 10:24 UTC, at a relative speed of 1.05 km/s. Confirmed by the latest screening, 10 Nov 00:52 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 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 2125Payload
NORAD 21100
CountryCIS
Launched1991-02-12
OrbitLEO · 1,457 × 1,473 km
COSPAR1991-009A
Maneuver capableUnknown
Profile →Globe →
COSMOS 1796Payload
NORAD 17140
CountryCIS
Launched1986-11-21
OrbitLEO · 1,454 × 1,478 km
COSPAR1986-092C
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1466 KMISS 420Starlink 550

At 1466 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 2125 ⟷ COSMOS 1796
2026-11-10 10:244.80 km Live forecast1.05 km/s1,466 kmShown above
2026-11-09 23:506.74 km Final forecast1.05 km/s1,464 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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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
9 Nov 21:51 UTC4.80 km Forecast10 Nov 10:24 UTC9 Nov 11:59 UTCRe-check
9 Nov 11:35 UTC4.80 km Forecast10 Nov 10:24 UTC9 Nov 07:00 UTCRe-check
9 Nov 11:21 UTC4.79 km Forecast10 Nov 10:24 UTC8 Nov 06:02 UTCRe-check
9 Nov 11:12 UTC4.87 km Forecast10 Nov 10:24 UTC8 Nov 06:02 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
3.48 km11-10 06:45 UTC
COSMOS 2125SL-8 DEB
4.22 km11-09 05:39 UTC
COSMOS 2008COSMOS 2125
4.41 km11-08 08:22 UTC
COSMOS 2071COSMOS 1796

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 →