SL-4 R/B

NORAD 68753· COSPAR 2026-083A· Active satellite· Other / Unclassified· SSO

Launch

Launched on Apr 16, 2026 from 43/4 (43R), Russia aboard a Soyuz 2.1b Volga.

Soyuz 2.1b/Volga | Kosmos (Unknown Payload) →

Live · TLE epoch 2026-10-23 23:51 UTC

Orbit class

SSO — Sun-Synchronous (LEO at 96–102° inclination)

Operator

Russian / Soviet Government

Country

Russia

Manufacturer

—

Launched

Apr 16, 2026

Mass

—

Apogee

542 km

Perigee

456 km

Inclination

98.29°

Period

1.57 h

Altitude history

Apogee and perigee for SL-4 R/B across 59 days of archived orbital elements (60 element sets, one per day).

Trend

Decaying

Change

-1.6 km

Rate

-0.03 km/day

Now

456 × 542 km

Apogee Perigee

Derived from our own archive of CelesTrak orbital elements, sampled every 3 hours. Short windows show drag and station-keeping; they are not a reentry prediction.

Launched with

6 other catalogued objects still in orbit from launch 2026-083 (Soyuz 2.1b/Volga | Kosmos (Unknown Payload)).

COSMOS 2609 · 68754
COSMOS 2610 · 68758
COSMOS 2611 · 68759
COSMOS 2612 · 68762
COSMOS 2613 · 68763
COSMOS 2614 · 68764

Sources & further reading

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