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HighProximity
United StatesSPACEMOBILE-013NORAD 100240 · launched Aug 2026Payload
2.63kmPredicted miss distance
United StatesALICENORAD 39467 · launched Dec 2013Payload
Final forecastFinal forecast, made 5 min before the pass.
After the passBest estimate, from the orbit data published nearest its time: 8.90 km at 31 Oct 20:42 UTC.
Closest approach31 Oct 202620:42 UTC
Relative speed15.14 km/sat the closest approach
Altitude523 kmlow Earth orbit
Last confirmed31 Oct20:36 UTC · final forecast
Track SPACEMOBILE-013Track ALICEAll approaches
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US SPACEMOBILE-013 and US ALICE were predicted to reach a closest approach of 2.63 km at 2026-10-31 20:42 UTC, at a relative speed of 15.14 km/s. Final forecast, made 5 min before the pass. Best estimate after the pass, from the orbit data published nearest its time: 8.90 km at 31 Oct 20:42 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
SPACEMOBILE-013Payload
NORAD 100240
CountryUS
Launched2026-08-05
OrbitLEO · 523 × 529 km
COSPAR2026-179A
Maneuver capableUnknown
Profile →Globe →
ALICEPayload
NORAD 39467
CountryUS
Launched2013-12-06
OrbitLEO · 420 × 644 km
COSPAR2013-072F
Maneuver capableUnknown
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 523 KMISS 420Starlink 550

At 523 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 · SPACEMOBILE-013 ⟷ ALICE
2026-10-31 20:422.63 km Final forecast15.14 km/s523 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 08:04 UTC8.90 km Best estimate31 Oct 20:42 UTC1 Nov 04:25 UTCBest estimate
31 Oct 09:16 UTC2.63 km Forecast31 Oct 20:42 UTC31 Oct 03:01 UTCRe-check
30 Oct 21:09 UTC2.66 km Forecast31 Oct 20:42 UTC30 Oct 09:33 UTCRe-check
30 Oct 21:01 UTC2.67 km Forecast31 Oct 20:42 UTC29 Oct 20:51 UTCRe-check
30 Oct 20:52 UTC6.18 km Forecast31 Oct 20:42 UTC29 Oct 20:51 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
1.24 km11-02 04:46 UTC
SPACEMOBILE-013STARLINK-4007
3.93 km10-30 14:37 UTC
SPACEMOBILE-013ORIGAMISAT-2
4.05 km10-29 12:45 UTC
SPACEMOBILE-013PACE

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 →