Home›Maneuver Tracker›Close Approaches›COSMOS 2512 ⟷ UK-DMC
HighProximity
RussiaCOSMOS 2512NORAD 41099 · launched Dec 2015Military payload
3.65kmPredicted miss distance
United KingdomUK-DMCNORAD 27942 · launched Sep 2003Payload
Final forecastFinal forecast, made minutes before the pass.
Closest approach27 Oct 202620:07 UTC
Relative speed14.82 km/sat the closest approach
Altitude649 kmlow Earth orbit
Last confirmed27 Oct20:03 UTC · final forecast
Track COSMOS 2512Track UK-DMCAll approaches
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RU COSMOS 2512 and UK UK-DMC were predicted to reach a closest approach of 3.65 km at 2026-10-27 20:07 UTC, at a relative speed of 14.82 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 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 2512Payload
NORAD 41099
CountryCIS
Launched2015-12-05
OrbitLEO · 638 × 644 km
COSPAR2015-071B
Maneuver capableUnknown
Profile →Globe →
UK-DMCPayload
NORAD 27942
CountryUK
Launched2003-09-27
OrbitLEO · 569 × 644 km
COSPAR2003-042D
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 649 KMISS 420Starlink 550

At 649 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 2512 ⟷ UK-DMC
2026-10-27 20:073.65 km Final forecast14.82 km/s649 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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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
27 Oct 13:00 UTC3.65 km Forecast27 Oct 20:07 UTC27 Oct 07:46 UTCRe-check
27 Oct 10:07 UTC3.64 km Forecast27 Oct 20:07 UTC26 Oct 23:38 UTCRe-check
27 Oct 09:47 UTC9.06 km Forecast27 Oct 20:07 UTC26 Oct 23:38 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
1.45 km10-30 10:55 UTC
COSMOS 2512SL-8 DEB *
4.50 km10-23 17:50 UTC
COSMOS 2512SL-16 DEB
4.87 km10-24 02:55 UTC
COSMOS 2512FENGYUN 1C DEB

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 2512 ⟷ UK-DMC: 3.65 km predicted close approach”, https://orbitalradar.com/conjunction/27942-41099 (accessed 2026-10-30).