Home›Maneuver Tracker›Close Approaches›FAST 2 (USA 228) ⟷ SCOUT B-1 R/B
HighProximity
United StatesFAST 2 (USA 228)NORAD 37380 · launched Nov 2010Military payload
2.77kmPredicted miss distance
United StatesSCOUT B-1 R/BNORAD 6180 · launched Sep 1972Rocket body
Final forecastFinal forecast, made 16 min before the pass.
After the passBest estimate, from the orbit data published nearest its time: 2.77 km at 24 Oct 16:04 UTC.
Closest approach24 Oct 202616:04 UTC
Relative speed2.47 km/sat the closest approach
Altitude623 kmlow Earth orbit
Last confirmed24 Oct15:49 UTC · final forecast
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US FAST 2 (USA 228) and US SCOUT B-1 R/B were predicted to reach a closest approach of 2.77 km at 2026-10-24 16:04 UTC, at a relative speed of 2.47 km/s. Final forecast, made 16 min before the pass. Best estimate after the pass, from the orbit data published nearest its time: 2.77 km at 24 Oct 16:04 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 mattersOne side of this pass cannot maneuver, so any avoidance decision rests with the other operator. Screening continues as new element sets arrive.

The Two Objects

Dossiers from the satellite directory
FAST 2 (USA 228)Payload
NORAD 37380
CountryUS
Launched2010-11-20
OrbitLEO · 602 × 626 km
COSPAR2010-062M
Maneuver capableUnknown
Profile →Globe →
SCOUT B-1 R/BR/B
NORAD 6180
CountryUS
Launched1972-09-02
OrbitLEO · 618 × 667 km
COSPAR1972-069B
Maneuver capableNo
Spent rocket stage: uncontrolled, tracked by the public catalogue.
Profile →Globe →

Where This Happens

Altitude context
DEBRIS BELT 700–1000 KM2006001,0001,5002,000 kmTHIS PASS · 623 KMISS 420Starlink 550

At 623 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 · FAST 2 (USA 228) ⟷ SCOUT B-1 R/B
2026-10-24 16:042.77 km Final forecast2.47 km/s623 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
27 Oct 07:24 UTC2.77 km Best estimate24 Oct 16:04 UTC24 Oct 06:14 UTCBest estimate
24 Oct 12:29 UTC2.77 km Forecast24 Oct 16:04 UTC24 Oct 06:14 UTCRe-check
24 Oct 00:29 UTC2.73 km Forecast24 Oct 16:04 UTC23 Oct 17:13 UTCRe-check
23 Oct 18:29 UTC2.54 km Forecast24 Oct 16:04 UTC23 Oct 05:50 UTCRe-check
23 Oct 16:29 UTC2.65 km Forecast24 Oct 16:04 UTC22 Oct 23:19 UTCRe-check
23 Oct 16:09 UTC3.06 km Forecast24 Oct 16:04 UTC22 Oct 23:19 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
82 m10-29 20:19 UTC
FAST 2 (USA 228)FALCON EYE 2
1.69 km10-28 01:05 UTC
FAST 2 (USA 228)KUIPER-00562
2.54 km10-30 11:27 UTC
FAST 1 (USA 222)FAST 2 (USA 228)

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 — “FAST 2 (USA 228) ⟷ SCOUT B-1 R/B: 2.77 km predicted close approach”, https://orbitalradar.com/conjunction/37380-6180 (accessed 2026-10-30).