Home›Maneuver Tracker›Close Approaches›COSMOS 2276 (GLONASS) ⟷ SL-12 R/B(2)
MediumProximity
RussiaCOSMOS 2276 (GLONASS)NORAD 23043 · launched Apr 1994Military payload
9.88kmPredicted miss distance
RussiaSL-12 R/B(2)NORAD 21221 · launched Apr 1991Rocket body
Live forecastConfirmed by the latest screening, 24 Oct 23:30 UTC.
Closest approach25 Oct 202621:48 UTC
Drift speed203 m/s731 km/h, seen from SL-12 R/B(2)
Altitude19,142 kmmedium Earth orbit
Separation now—live
Track COSMOS 2276 (GLONASS)Track SL-12 R/B(2)All approaches
Share

RU COSMOS 2276 (GLONASS) and RU SL-12 R/B(2) are predicted to reach a closest approach of 9.88 km at 2026-10-25 21:48 UTC, drifting past at about 203 m/s (731 km/h) as seen from SL-12 R/B(2). Confirmed by the latest screening, 24 Oct 23:30 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
COSMOS 2276 (GLONASS)Payload
NORAD 23043
CountryCIS
Launched1994-04-11
OrbitMEO · 19,076 × 19,184 km
COSPAR1994-021A
Maneuver capableUnknown
Profile →Globe →
SL-12 R/B(2)R/B
NORAD 21221
CountryCIS
Launched1991-04-04
OrbitMEO · 19,083 × 19,166 km
COSPAR1991-025E
Maneuver capableNo
Spent rocket stage: uncontrolled, tracked by the public catalogue.
Profile →Globe →

Where This Happens

Altitude context
GEO BELT 35,786 KMTHIS PASS · 19,142 KMLEOMEOGEO

This pass happens near the geostationary belt, where satellites hold fixed longitude slots and relative speeds are low. Close approaches here are usually slow drifts rather than crossing passes. About GEO →

History Between This Pair

1 predicted pass under 10 km
Pair history · COSMOS 2276 (GLONASS) ⟷ SL-12 R/B(2)
2026-10-25 21:489.88 km Live forecast0.20 km/s19,142 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
24 Oct 21:49 UTC9.88 km Forecast25 Oct 21:48 UTC22 Oct 12:16 UTCScreen

These Objects Elsewhere

Other screened approaches · 7 days
6.40 km10-22 14:10 UTC
COSMOS 2464 (GLONASS)SL-12 R/B(2)

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 — “COSMOS 2276 (GLONASS) ⟷ SL-12 R/B(2): 9.88 km predicted close approach”, https://orbitalradar.com/conjunction/21221-23043 (accessed 2026-10-24).