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critical · PROXIMITY
US RADIX-MTBD OBJECT AB
969 mpredicted miss distance
Live forecastConfirmed by the latest screening, 20 Oct 20:53 UTC.
Predicted closest approach
2026-10-21 03:33 UTC
Relative speed
0.39 km/s
Altitude
502 km
Last confirmed
20 Oct 20:53 UTC
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US RADIX-M and TBD OBJECT AB are predicted to reach a closest approach of 969 m at 2026-10-21 03:33 UTC, at a relative speed of 0.39 km/s. Confirmed by the latest screening, 20 Oct 20:53 UTC. 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
RADIX-MPayload
NORAD 100940
CountryUS
Launched2026-10-01
OrbitLEO · 509 × 516 km
COSPAR2026-227BK
Maneuver capableUnknown
Profile →Globe →
OBJECT ABPayload
NORAD 67273
CountryTBD
Launched2025-12-28
OrbitLEO · 492 × 509 km
COSPAR2025-313AB
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 502 KMISS 420Starlink 550

At 502 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 · RADIX-M ⟷ OBJECT AB
2026-10-21 03:33969 m Live forecast0.39 km/s502 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 Nothing is overwritten: a withdrawn forecast keeps its figure, with the newer check beside it, and the best estimate after the pass is a row of its own.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
20 Oct 12:32 UTC969 m Forecast21 Oct 03:33 UTC20 Oct 03:29 UTCRe-check
20 Oct 12:13 UTC904 m Forecast21 Oct 03:33 UTC19 Oct 22:45 UTCRe-check

These Objects Elsewhere

Other screened approaches · 7 days
646 m10-20 13:14 UTC
RADIX-MRADIX-A
732 m10-19 23:47 UTC
RADIX-MRADIX-A
921 m10-20 14:50 UTC
RADIX-MRADIX-A

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 — “RADIX-M ⟷ OBJECT AB: 969 m predicted close approach”, https://orbitalradar.com/conjunction/100940-67273 (accessed 2026-10-20).