Home›Maneuver Tracker›Close Approaches›SJ-11-06 ⟷ FENGYUN 1C DEB
HighProximity
ChinaSJ-11-06NORAD 39624 · launched Mar 2014Military payload
4.99kmPredicted miss distance
ChinaFENGYUN 1C DEBNORAD 29791 · launched May 1999Debris
Final forecastFinal forecast, made 16 min before the pass.
Closest approach22 Oct 202607:40 UTC
Relative speed1.52 km/sat the closest approach
Altitude689 kmlow Earth orbit
Last confirmed22 Oct07:24 UTC · final forecast
Track SJ-11-06Track FENGYUN 1C DEBAll approaches
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CN SJ-11-06 and CN FENGYUN 1C DEB were predicted to reach a closest approach of 4.99 km at 2026-10-22 07:40 UTC, at a relative speed of 1.52 km/s. Final forecast, made 16 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
SJ-11-06Payload
NORAD 39624
CountryPRC
Launched2014-03-31
OrbitLEO · 678 × 696 km
COSPAR2014-014A
Maneuver capableUnknown
Profile →Globe →
FENGYUN 1C DEBDebris
NORAD 29791
CountryPRC
Launched1999-05-10
OrbitLEO · 660 × 715 km
COSPAR1999-025CH
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 · 689 KMISS 420Starlink 550

At 689 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

5 predicted passes under 10 km
Pair history · SJ-11-06 ⟷ FENGYUN 1C DEB
2026-10-22 12:366.17 km Final forecast1.53 km/s689 kmView →
2026-10-22 10:573.30 km Final forecast1.53 km/s689 kmView →
2026-10-22 07:404.99 km Final forecast1.52 km/s689 kmShown above
2026-10-20 03:565.65 km Final forecast1.49 km/s686 kmView →
2026-10-19 23:008.30 km Not re-confirmed1.49 km/s686 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 UTC4.99 km Forecast22 Oct 07:40 UTC21 Oct 14:02 UTCRe-check
21 Oct 13:50 UTC5.87 km Forecast22 Oct 07:40 UTC21 Oct 07:28 UTCRe-check
21 Oct 13:30 UTC6.05 km Forecast22 Oct 07:40 UTC21 Oct 07:28 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
4.30 km10-24 07:20 UTC
SJ-11-06IRIDIUM 33 DEB
4.66 km10-21 07:01 UTC
SJ-11-06CZ-6A DEB
5.04 km10-23 23:56 UTC
SJ-11-06IRIDIUM 33 DEB

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 — “SJ-11-06 ⟷ FENGYUN 1C DEB: 4.99 km predicted close approach”, https://orbitalradar.com/conjunction/29791-39624 (accessed 2026-10-23).