Home›Maneuver Tracker›Close Approaches›YAOGAN-36 05C ⟷ Z-SAT
CriticalProximity
Final forecastFinal forecast, made 18 min before the pass.
Closest approach2 Nov 202619:53 UTC
Relative speed8.87 km/sat the closest approach
Altitude509 kmlow Earth orbit
Last confirmed2 Nov19:35 UTC · final forecast

CN YAOGAN-36 05C and JP Z-SAT were predicted to reach a closest approach of 505 m at 2026-11-02 19:53 UTC, at a relative speed of 8.87 km/s. Final forecast, made 18 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
NORAD 57456
CountryPRC
Launched2023-07-26
COSPAR2023-106E
Maneuver capableUnknown
Z-SATPayload
NORAD 49399
CountryJPN
Launched2021-11-09
COSPAR2021-102E
Maneuver capableUnknown

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 509 KMISS 420Starlink 550

At 509 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 · YAOGAN-36 05C ⟷ Z-SAT
2026-11-02 19:53505 m Final forecast8.87 km/s509 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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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
2 Nov 09:14 UTC505 m Forecast2 Nov 19:53 UTC2 Nov 03:58 UTCRe-check
2 Nov 08:55 UTC1.24 km Forecast2 Nov 19:53 UTC1 Nov 12:10 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
809 m11-02 20:02 UTC
YAOGAN-36 05COBJECT AA
1.58 km11-05 21:49 UTC
YAOGAN-36 05CBLACKJACK ACES-1
2.18 km11-02 21:37 UTC
YAOGAN-36 05COBJECT AA

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 →