Home›Maneuver Tracker›Close Approaches›COSMOS 1998 ⟷ COSMOS 1473
HighProximity
RussiaCOSMOS 1998NORAD 19789 · launched Feb 1989Military payload
4.85kmPredicted miss distance
RussiaCOSMOS 1473NORAD 14171 · launched Jul 1983Military payload
Final forecastFinal forecast, made minutes before the pass.
Closest approach8 Nov 202610:31 UTC
Relative speed9.51 km/sat the closest approach
Altitude1,403 kmlow Earth orbit
Last confirmed8 Nov10:28 UTC · final forecast
Track COSMOS 1998Track COSMOS 1473All approaches
Share

RU COSMOS 1998 and RU COSMOS 1473 were predicted to reach a closest approach of 4.85 km at 2026-11-08 10:31 UTC, at a relative speed of 9.51 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 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 1998Payload
NORAD 19789
CountryCIS
Launched1989-02-10
OrbitLEO · 1,391 × 1,415 km
COSPAR1989-009E
Maneuver capableUnknown
Profile →Globe →
COSMOS 1473Payload
NORAD 14171
CountryCIS
Launched1983-07-06
OrbitLEO · 1,394 × 1,462 km
COSPAR1983-069A
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1403 KMISS 420Starlink 550

At 1403 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 1998 ⟷ COSMOS 1473
2026-11-08 10:314.85 km Final forecast9.51 km/s1,403 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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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
8 Nov 08:01 UTC4.85 km Forecast8 Nov 10:31 UTC7 Nov 23:22 UTCRe-check
7 Nov 12:51 UTC4.81 km Forecast8 Nov 10:31 UTC7 Nov 05:39 UTCRe-check
7 Nov 11:46 UTC4.78 km Forecast8 Nov 10:31 UTC6 Nov 19:55 UTCRe-check
7 Nov 11:27 UTC6.38 km Forecast8 Nov 10:31 UTC6 Nov 19:55 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
1.88 km11-04 09:14 UTC
COSMOS 2328COSMOS 1473
2.74 km11-09 07:31 UTC
COSMOS 2162COSMOS 1473
3.86 km11-04 15:25 UTC
COSMOS 1998COSMOS 1690

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 →