Home›Maneuver Tracker›Close Approaches›YAOGAN-50 02 DEB ⟷ COSMOS 1275 DEB
HighCross-border
ChinaYAOGAN-50 02 DEBNORAD 101051 · launched Mar 2026Military debris
4.03kmPredicted miss distance
RussiaCOSMOS 1275 DEBNORAD 13480 · launched Jun 1981Military debris
Final forecastFinal forecast, made 11 min before the pass.
Closest approach10 Nov 202612:25 UTC
Relative speed11.12 km/sat the closest approach
Altitude856 kmlow Earth orbit
Last confirmed10 Nov12:13 UTC · final forecast
Track YAOGAN-50 02 DEBTrack COSMOS 1275 DEBAll approaches
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CN YAOGAN-50 02 DEB and RU COSMOS 1275 DEB were predicted to reach a closest approach of 4.03 km at 2026-11-10 12:25 UTC, at a relative speed of 11.12 km/s. Final forecast, made 11 min before the pass. 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 mattersNeither object can maneuver: the miss distance will evolve only with natural orbital perturbations, so screening continues until the pass is over.

The Two Objects

Dossiers from the satellite directory
YAOGAN-50 02 DEBDebris
NORAD 101051
CountryPRC
Launched2026-03-15
OrbitLEO · 843 × 975 km
COSPAR2026-051BT
Maneuver capableNo
Uncontrolled debris fragment tracked by the public catalogue. About space debris →
Profile →Globe →
COSMOS 1275 DEBDebris
NORAD 13480
CountryCIS
Launched1981-06-04
OrbitLEO · 849 × 940 km
COSPAR1981-053GA
Maneuver capableNo
Uncontrolled debris fragment tracked by the public catalogue. About space debris →
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 856 KMISS 420Starlink 550

At 856 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 · YAOGAN-50 02 DEB ⟷ COSMOS 1275 DEB
2026-11-10 12:254.03 km Final forecast11.12 km/s856 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 10:13 UTC4.03 km Forecast10 Nov 12:25 UTC9 Nov 18:27 UTCRe-check
10 Nov 09:55 UTC8.89 km Forecast10 Nov 12:25 UTC9 Nov 18:27 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
1.00 km11-04 19:51 UTC
YAOGAN-50 02 DEBCOSMOS 1375
2.36 km11-08 13:31 UTC
YAOGAN-50 02 DEBMETEOR 2-17 DEB
4.30 km11-05 07:45 UTC
YAOGAN-50 02 DEBPRAETORIAN SDA_603

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 →