Home›Maneuver Tracker›Close Approaches›SHIYAN 27E ⟷ FENGYUN 1C DEB *
HighProximity
ChinaSHIYAN 27ENORAD 63603 · launched Apr 2025Military payload
4.33kmPredicted miss distance
ChinaFENGYUN 1C DEB *NORAD 46993 · launched May 1999Debris
Final forecastFinal forecast, made 17 min before the pass.
Closest approach27 Oct 202619:00 UTC
Relative speed10.10 km/sat the closest approach
Altitude1,054 kmlow Earth orbit
Last confirmed27 Oct18:43 UTC · final forecast
Track SHIYAN 27ETrack FENGYUN 1C DEB *All approaches
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CN SHIYAN 27E and CN FENGYUN 1C DEB * were predicted to reach a closest approach of 4.33 km at 2026-10-27 19:00 UTC, at a relative speed of 10.10 km/s. Final forecast, made 17 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 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 27EPayload
NORAD 63603
CountryPRC
Launched2025-04-18
OrbitLEO · 1,045 × 1,046 km
COSPAR2025-078E
Maneuver capableUnknown
Profile →Globe →
FENGYUN 1C DEB *Debris
NORAD 46993
CountryPRC
Launched1999-05-10
OrbitLEO · 807 × 1,196 km
COSPAR1999-025EZT
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 · 1054 KMISS 420Starlink 550

At 1054 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 · SHIYAN 27E ⟷ FENGYUN 1C DEB *
2026-10-27 19:004.33 km Final forecast10.10 km/s1,054 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 UTC4.33 km Forecast27 Oct 19:00 UTC27 Oct 07:06 UTCRe-check
27 Oct 10:45 UTC4.31 km Forecast27 Oct 19:00 UTC27 Oct 00:02 UTCRe-check
27 Oct 10:26 UTC5.50 km Forecast27 Oct 19:00 UTC27 Oct 00:02 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
2.37 km10-26 15:34 UTC
SHIYAN 27ENOAA 16 DEB
2.77 km10-25 05:09 UTC
SHIYAN 27ENIMBUS 2 DEB
3.38 km10-28 18:20 UTC
SHIYAN 27ETRANSIT 4B

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 27E ⟷ FENGYUN 1C DEB *: 4.33 km predicted close approach”, https://orbitalradar.com/conjunction/46993-63603 (accessed 2026-10-28).