Home›Maneuver Tracker›Close Approaches›COSMOS 2065 ⟷ SL-8 R/B
HighProximity
RussiaCOSMOS 2065NORAD 20550 · launched Apr 1990Military payload
3.52kmPredicted miss distance
RussiaSL-8 R/BNORAD 10293 · launched Aug 1977Rocket body
Final forecastFinal forecast, made minutes before the pass.
Closest approach24 Oct 202609:09 UTC
Relative speed3.00 km/sat the closest approach
Altitude1,457 kmlow Earth orbit
Last confirmed24 Oct09:09 UTC · final forecast
Track COSMOS 2065Track SL-8 R/BAll approaches
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RU COSMOS 2065 and RU SL-8 R/B were predicted to reach a closest approach of 3.52 km at 2026-10-24 09:09 UTC, at a relative speed of 3.00 km/s. Final forecast, made minutes 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 2065Payload
NORAD 20550
CountryCIS
Launched1990-04-06
OrbitLEO · 1,462 × 1,474 km
COSPAR1990-029B
Maneuver capableUnknown
Profile →Globe →
SL-8 R/BR/B
NORAD 10293
CountryCIS
Launched1977-08-24
OrbitLEO · 1,463 × 1,677 km
COSPAR1977-079J
Maneuver capableNo
Spent rocket stage: uncontrolled, tracked by the public catalogue.
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1457 KMISS 420Starlink 550

At 1457 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 2065 ⟷ SL-8 R/B
2026-10-24 09:093.52 km Final forecast3.00 km/s1,457 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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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
24 Oct 00:29 UTC3.52 km Forecast24 Oct 09:09 UTC23 Oct 21:00 UTCRe-check
23 Oct 18:29 UTC3.50 km Forecast24 Oct 09:09 UTC23 Oct 06:40 UTCRe-check
23 Oct 12:49 UTC3.49 km Forecast24 Oct 09:09 UTC23 Oct 00:50 UTCRe-check
23 Oct 12:29 UTC3.78 km Forecast24 Oct 09:09 UTC23 Oct 00:50 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
1.07 km10-26 23:47 UTC
COSMOS 2065THORAD DELTA 1 DEB
5.86 km10-22 09:12 UTC
COSMOS 2065COSMOS 1051
6.36 km10-25 21:32 UTC
COSMOS 2065COSMOS 1056

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 2065 ⟷ SL-8 R/B: 3.52 km predicted close approach”, https://orbitalradar.com/conjunction/10293-20550 (accessed 2026-10-26).