Home›Maneuver Tracker›Close Approaches›SHIYAN 23 (SY-23) ⟷ FENGYUN 1C DEB
MediumProximity
ChinaSHIYAN 23 (SY-23)NORAD 59728 · launched May 2024Military payload
8.46kmPredicted miss distance
ChinaFENGYUN 1C DEBNORAD 30569 · launched May 1999Debris
Final forecastFinal forecast, made minutes before the pass.
Closest approach22 Oct 202604:08 UTC
Relative speed14.94 km/sat the closest approach
Altitude603 kmlow Earth orbit
Last confirmed22 Oct04:04 UTC · final forecast
Track SHIYAN 23 (SY-23)Track FENGYUN 1C DEBAll approaches
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CN SHIYAN 23 (SY-23) and CN FENGYUN 1C DEB were predicted to reach a closest approach of 8.46 km at 2026-10-22 04:08 UTC, at a relative speed of 14.94 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
SHIYAN 23 (SY-23)Payload
NORAD 59728
CountryPRC
Launched2024-05-11
OrbitLEO · 603 × 610 km
COSPAR2024-089A
Maneuver capableUnknown
Profile →Globe →
FENGYUN 1C DEBDebris
NORAD 30569
CountryPRC
Launched1999-05-10
OrbitLEO · 599 × 606 km
COSPAR1999-025ALK
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 · 603 KMISS 420Starlink 550

At 603 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

2 predicted passes under 10 km
Pair history · SHIYAN 23 (SY-23) ⟷ FENGYUN 1C DEB
2026-10-22 08:101.57 km Final forecast14.92 km/s611 kmView →
2026-10-22 04:088.46 km Final forecast14.94 km/s603 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
22 Oct 02:04 UTC8.46 km Forecast22 Oct 04:08 UTC21 Oct 11:18 UTCRe-check
21 Oct 13:50 UTC8.51 km Forecast22 Oct 04:08 UTC20 Oct 18:07 UTCRe-check
21 Oct 13:30 UTC8.68 km Forecast22 Oct 04:08 UTC20 Oct 18:07 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
2.15 km10-20 21:46 UTC
SHIYAN 23 (SY-23)SL-14 R/B
3.56 km10-23 19:08 UTC
SHIYAN 23 (SY-23)COSMOS 2251 DEB
4.56 km10-18 07:07 UTC
SHIYAN 23 (SY-23)SL-14 R/B

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 — “SHIYAN 23 (SY-23) ⟷ FENGYUN 1C DEB: 8.46 km predicted close approach”, https://orbitalradar.com/conjunction/30569-59728 (accessed 2026-10-22).