Home›Maneuver Tracker›Close Approaches›COSMOS 2090 ⟷ COSMOS 2299
MediumProximity
RussiaCOSMOS 2090NORAD 20735 · launched Aug 1990Military payload
7.33kmPredicted miss distance
RussiaCOSMOS 2299NORAD 23441 · launched Dec 1994Military payload
Final forecastFinal forecast, made minutes before the pass.
After the passBest estimate, from the orbit data published nearest its time: 7.29 km at 21 Oct 08:32 UTC.
Closest approach21 Oct 202608:32 UTC
Relative speed3.06 km/sat the closest approach
Altitude1,413 kmlow Earth orbit
Last confirmed21 Oct08:32 UTC · final forecast
Track COSMOS 2090Track COSMOS 2299All approaches
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RU COSMOS 2090 and RU COSMOS 2299 were predicted to reach a closest approach of 7.33 km at 2026-10-21 08:32 UTC, at a relative speed of 3.06 km/s. Final forecast, made minutes before the pass. Best estimate after the pass, from the orbit data published nearest its time: 7.29 km at 21 Oct 08:32 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 2090Payload
NORAD 20735
CountryCIS
Launched1990-08-08
OrbitLEO · 1,389 × 1,412 km
COSPAR1990-070A
Maneuver capableUnknown
Profile →Globe →
COSMOS 2299Payload
NORAD 23441
CountryCIS
Launched1994-12-26
OrbitLEO · 1,403 × 1,412 km
COSPAR1994-086A
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1413 KMISS 420Starlink 550

At 1413 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 2090 ⟷ COSMOS 2299
2026-10-21 08:327.33 km Final forecast3.06 km/s1,413 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
23 Oct 08:36 UTC7.29 km Best estimate21 Oct 08:32 UTC21 Oct 11:49 UTCBest estimate
21 Oct 03:52 UTC7.33 km Forecast21 Oct 08:32 UTC20 Oct 23:35 UTCRe-check
20 Oct 15:22 UTC7.39 km Forecast21 Oct 08:32 UTC20 Oct 03:33 UTCRe-check
20 Oct 15:02 UTC7.95 km Forecast21 Oct 08:32 UTC20 Oct 03:33 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
3.72 km10-19 20:34 UTC
COSMOS 2090COSMOS 1229
4.70 km10-16 18:26 UTC
COSMOS 2039COSMOS 2090
4.79 km10-23 05:31 UTC
COSMOS 2299COSMOS 506

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 →

Cite this encounter: Orbital Radar — “COSMOS 2090 ⟷ COSMOS 2299: 7.33 km predicted close approach”, https://orbitalradar.com/conjunction/20735-23441 (accessed 2026-10-23).