Home›Maneuver Tracker›Close Approaches›COSMOS 2144 ⟷ GONETS D1 4
HighProximity
RussiaCOSMOS 2144NORAD 21300 · launched May 1991Military payload
1.58kmPredicted miss distance
RussiaGONETS D1 4NORAD 24728 · launched Feb 1997Payload
Final forecastFinal forecast, made 9 min before the pass.
Closest approach23 Oct 202619:17 UTC
Relative speed10.29 km/sat the closest approach
Altitude1,405 kmlow Earth orbit
Last confirmed23 Oct19:09 UTC · final forecast
Track COSMOS 2144Track GONETS D1 4All approaches
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RU COSMOS 2144 and RU GONETS D1 4 were predicted to reach a closest approach of 1.58 km at 2026-10-23 19:17 UTC, at a relative speed of 10.29 km/s. Final forecast, made 9 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
COSMOS 2144Payload
NORAD 21300
CountryCIS
Launched1991-05-16
OrbitLEO · 1,409 × 1,417 km
COSPAR1991-033B
Maneuver capableUnknown
Profile →Globe →
GONETS D1 4Payload
NORAD 24728
CountryCIS
Launched1997-02-14
OrbitLEO · 1,401 × 1,412 km
COSPAR1997-006D
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1405 KMISS 420Starlink 550

At 1405 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 · COSMOS 2144 ⟷ GONETS D1 4
2026-10-23 19:171.58 km Final forecast10.29 km/s1,405 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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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
23 Oct 10:16 UTC1.58 km Forecast23 Oct 19:17 UTC22 Oct 21:56 UTCRe-check
22 Oct 22:16 UTC1.58 km Forecast23 Oct 19:17 UTC22 Oct 16:11 UTCRe-check
22 Oct 21:57 UTC9.51 km Forecast23 Oct 19:17 UTC22 Oct 06:43 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
2.60 km10-18 02:22 UTC
COSMOS 2144COSMOS 2273
3.49 km10-22 08:04 UTC
COSMOS 2067COSMOS 2144
3.72 km10-22 21:02 UTC
COSMOS 2144GLOBALSTAR M068

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 — “COSMOS 2144 ⟷ GONETS D1 4: 1.58 km predicted close approach”, https://orbitalradar.com/conjunction/21300-24728 (accessed 2026-10-24).