Home›Maneuver Tracker›Close Approaches›COSMOS 2127 ⟷ COSMOS 594
CriticalProximity
RussiaCOSMOS 2127NORAD 21102 · launched Feb 1991Military payload
788mPredicted miss distance
RussiaCOSMOS 594NORAD 6851 · launched Oct 1973Military payload
Final forecastFinal forecast, made 7 min before the pass.
Closest approach27 Oct 202602:10 UTC
Relative speed10.67 km/sat the closest approach
Altitude1,480 kmlow Earth orbit
Last confirmed27 Oct02:04 UTC · final forecast
Track COSMOS 2127Track COSMOS 594All approaches
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RU COSMOS 2127 and RU COSMOS 594 were predicted to reach a closest approach of 788 m at 2026-10-27 02:10 UTC, at a relative speed of 10.67 km/s. Final forecast, made 7 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 2127Payload
NORAD 21102
CountryCIS
Launched1991-02-12
OrbitLEO · 1,467 × 1,477 km
COSPAR1991-009C
Maneuver capableUnknown
Profile →Globe →
COSMOS 594Payload
NORAD 6851
CountryCIS
Launched1973-10-02
OrbitLEO · 1,380 × 1,485 km
COSPAR1973-069G
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 1480 KMISS 420Starlink 550

At 1480 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 2127 ⟷ COSMOS 594
2026-10-27 02:10788 m Final forecast10.67 km/s1,480 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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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
26 Oct 16:41 UTC788 m Forecast27 Oct 02:10 UTC26 Oct 04:34 UTCRe-check
26 Oct 10:28 UTC795 m Forecast27 Oct 02:10 UTC25 Oct 23:53 UTCRe-check
26 Oct 10:06 UTC6.49 km Forecast27 Oct 02:10 UTC25 Oct 23:53 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
1.53 km10-24 22:18 UTC
COSMOS 2127COSMOS 735
3.79 km10-28 08:04 UTC
COSMOS 2127ESSA 6 (TOS-D)
5.35 km10-22 10:35 UTC
COSMOS 2127SL-14 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 — “COSMOS 2127 ⟷ COSMOS 594: 788 m predicted close approach”, https://orbitalradar.com/conjunction/21102-6851 (accessed 2026-10-28).