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HighProximity

United StatesCAPELLA-21 (ACADIA)NORAD 101118 · launched Oct 2026Payload

2.10kmPredicted miss distance

United StatesPELICAN-12NORAD 101128 · launched Oct 2026Payload

Final forecastFinal forecast, made 7 min before the pass.

Closest approach10 Nov 202620:13 UTC

Drift speed3.9 m/s14 km/h, seen from PELICAN-12

Altitude589 kmlow Earth orbit

Last confirmed10 Nov20:06 UTC · final forecast

Track CAPELLA-21 (ACADIA)Track PELICAN-12 All approaches

US CAPELLA-21 (ACADIA) and US PELICAN-12 were predicted to reach a closest approach of 2.10 km at 2026-11-10 20:13 UTC, drifting past at about 3.9 m/s (14 km/h) as seen from PELICAN-12. 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

CAPELLA-21 (ACADIA)Payload

NORAD 101118

CountryUS

Launched2026-10-20

OrbitLEO · 584 × 593 km

COSPAR2026-237H

Maneuver capableUnknown

Profile →Globe →

PELICAN-12Payload

NORAD 101128

CountryUS

Launched2026-10-20

OrbitLEO · 583 × 592 km

COSPAR2026-237T

Maneuver capableUnknown

Profile →Globe →

Where This Happens

Altitude context

At 589 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

6 predicted passes under 10 km

Pair history · CAPELLA-21 (ACADIA) ⟷ PELICAN-12

2026-11-10 21:429.71 km Final forecast0.01 km/s590 kmView →

2026-11-10 21:022.94 km Final forecast0.00 km/s584 kmView →

2026-11-10 20:132.10 km Final forecast0.00 km/s589 kmShown above

2026-11-10 19:05989 m Not re-confirmed0.00 km/s585 kmView →

2026-11-10 18:031.50 km Withdrawn0.00 km/s589 kmView →

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

10 Nov 14:28 UTC2.10 km Forecast10 Nov 20:13 UTC10 Nov 11:05 UTCRe-check

10 Nov 03:51 UTC1.82 km Forecast10 Nov 20:41 UTC10 Nov 00:26 UTCRe-check

9 Nov 21:51 UTC1.86 km Forecast10 Nov 20:17 UTC9 Nov 16:45 UTCRe-check

9 Nov 20:14 UTC1.68 km Forecast10 Nov 20:20 UTC9 Nov 15:56 UTCRe-check

9 Nov 19:54 UTC5.66 km Forecast10 Nov 19:54 UTC9 Nov 15:56 UTCScreen

9 Nov 19:34 UTC8.45 km Forecast10 Nov 19:34 UTC9 Nov 15:56 UTCScreen

9 Nov 19:14 UTC8.71 km Forecast10 Nov 19:07 UTC9 Nov 15:56 UTCScreen

9 Nov 18:54 UTC9.25 km Forecast10 Nov 18:54 UTC9 Nov 15:56 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days

244 m11-09 18:50 UTC

PELICAN-12TURKSAT 3U

477 m11-07 19:02 UTC

CAPELLA-21 (ACADIA)ICEYE-X110

638 m11-06 20:25 UTC

PELICAN-12ICEYE-X109

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 →