Home›Maneuver Tracker›Close Approaches›COSMOS 2361 ⟷ SDA_1667
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RussiaCOSMOS 2361NORAD 25590 · launched Dec 1998Military payload
7.26kmPredicted miss distance
United StatesSDA_1667NORAD 65977 · launched Oct 2025Payload
Final forecastFinal forecast, made minutes before the pass.
After the passBest estimate, from the orbit data published nearest its time: 7.32 km at 6 Nov 12:15 UTC.
Closest approach6 Nov 202612:15 UTC
Relative speed2.56 km/sat the closest approach
Altitude954 kmlow Earth orbit
Last confirmed6 Nov12:15 UTC · final forecast
Track COSMOS 2361Track SDA_1667All approaches
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RU COSMOS 2361 and US SDA_1667 were predicted to reach a closest approach of 7.26 km at 2026-11-06 12:15 UTC, at a relative speed of 2.56 km/s. Final forecast, made minutes before the pass. Best estimate after the pass, from the orbit data published nearest its time: 7.32 km at 6 Nov 12:15 UTC. This is a cross-border encounter between objects of different nations. 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 2361Payload
NORAD 25590
CountryCIS
Launched1998-12-24
OrbitLEO · 964 × 1,012 km
COSPAR1998-076A
Maneuver capableUnknown
Profile →Globe →
SDA_1667Payload
NORAD 65977
CountryUS
Launched2025-10-15
OrbitLEO · 958 × 959 km
COSPAR2025-230D
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 954 KMISS 420Starlink 550

At 954 km this pass sits inside the most congested band in low Earth orbit, home to the debris left by the 2007 ASAT test and the 2009 collision. 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 2361 ⟷ SDA_1667
2026-11-06 12:157.26 km Final forecast · after: 7.32 km2.56 km/s954 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 08:11 UTC7.32 km Best estimate6 Nov 12:15 UTC6 Nov 08:31 UTCBest estimate
6 Nov 10:00 UTC7.26 km Forecast6 Nov 12:15 UTC5 Nov 20:51 UTCRe-check
6 Nov 09:41 UTC7.57 km Forecast6 Nov 12:15 UTC5 Nov 20:51 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
966 m11-13 02:10 UTC
COSMOS 2361HBTSS-SV2
1.22 km11-12 12:37 UTC
COSMOS 2361THORAD AGENA D DEB
2.19 km11-12 23:50 UTC
COSMOS 1577SDA_1667

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 →