Home›Maneuver Tracker›Close Approaches›YAOGAN-39 01C ⟷ YAOGAN-39 02C
HighProximity
ChinaYAOGAN-39 01CNORAD 57731 · launched Aug 2023Military payload
1.69kmPredicted miss distance
ChinaYAOGAN-39 02CNORAD 57890 · launched Sep 2023Military payload
Final forecastFinal forecast, made 10 min before the pass.
Closest approach22 Oct 202603:34 UTC
Relative speed5.13 km/sat the closest approach
Altitude514 kmlow Earth orbit
Last confirmed22 Oct03:24 UTC · final forecast
Track YAOGAN-39 01CTrack YAOGAN-39 02CAll approaches
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CN YAOGAN-39 01C and CN YAOGAN-39 02C were predicted to reach a closest approach of 1.69 km at 2026-10-22 03:34 UTC, at a relative speed of 5.13 km/s. Final forecast, made 10 min 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
YAOGAN-39 01CPayload
NORAD 57731
CountryPRC
Launched2023-08-31
OrbitLEO · 507 × 521 km
COSPAR2023-130E
Maneuver capableUnknown
Profile →Globe →
YAOGAN-39 02CPayload
NORAD 57890
CountryPRC
Launched2023-09-17
OrbitLEO · 512 × 516 km
COSPAR2023-145E
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 514 KMISS 420Starlink 550

At 514 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

5 predicted passes under 10 km
Pair history · YAOGAN-39 01C ⟷ YAOGAN-39 02C
2026-10-23 02:289.48 km Live forecast5.13 km/s510 kmView →
2026-10-22 03:341.69 km Final forecast5.13 km/s514 kmShown above
2026-10-22 01:591.05 km Final forecast5.13 km/s514 kmView →
2026-10-21 22:503.29 km Final forecast5.13 km/s514 kmView →
2026-10-21 21:155.24 km Final forecast5.13 km/s514 kmView →

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
22 Oct 02:04 UTC1.69 km Forecast22 Oct 03:34 UTC21 Oct 15:28 UTCRe-check
21 Oct 13:50 UTC2.85 km Forecast22 Oct 03:34 UTC21 Oct 01:15 UTCRe-check
21 Oct 13:30 UTC4.95 km Forecast22 Oct 03:34 UTC21 Oct 01:15 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
2.22 km10-19 07:45 UTC
YAOGAN-39 01CVEGA
3.84 km10-22 13:09 UTC
YAOGAN-39 02CCOSMOS 2576
4.54 km10-15 17:47 UTC
YAOGAN-39 02COBJECT D

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 — “YAOGAN-39 01C ⟷ YAOGAN-39 02C: 1.69 km predicted close approach”, https://orbitalradar.com/conjunction/57731-57890 (accessed 2026-10-22).