Home›Maneuver Tracker›Close Approaches›DMSP 5D-2 F11 (USA 73) ⟷ METEOR 1-13
HighCross-border
On permanent record
ForecastForecast made 4 Nov 12:06 UTC.
Closest approach5 Nov 202606:18 UTC
Relative speed5.70 km/sat the closest approach
Altitude833 kmlow Earth orbit
Last confirmed4 Nov12:06 UTC · forecast

US DMSP 5D-2 F11 (USA 73) and RU METEOR 1-13 are predicted to reach a closest approach of 4.44 km at 2026-11-05 06:18 UTC, at a relative speed of 5.70 km/s. Forecast made 4 Nov 12:06 UTC. This is a cross-border encounter between objects of different nations, the kind of event closely watched for space-security implications. 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
NORAD 21798
CountryUS
Launched1991-11-28
COSPAR1991-082A
Maneuver capableUnknown
NORAD 6256
CountryCIS
Launched1972-10-26
COSPAR1972-085A
Maneuver capableUnknown

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 833 KMISS 420Starlink 550

At 833 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

1 predicted pass under 10 km
Pair history · DMSP 5D-2 F11 (USA 73) ⟷ METEOR 1-13
2026-11-05 06:184.44 km Forecast5.70 km/s833 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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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
4 Nov 10:12 UTC4.44 km Forecast5 Nov 06:18 UTC4 Nov 04:13 UTCRe-check
4 Nov 09:52 UTC4.58 km Forecast5 Nov 06:18 UTC4 Nov 04:13 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
3.25 km11-03 12:41 UTC
DMSP 5D-2 F11 (USA 73)FENGYUN 1C DEB
4.22 km11-04 16:01 UTC
DMSP 5D-2 F11 (USA 73)OBJECT E
4.98 km11-04 16:27 UTC
DMSP 5D-2 F11 (USA 73)COSMOS 1275 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 →

✓ Permanent record. This encounter met the notability thresholds and keeps an archived page after the pass.