CHECKMATE 6

NORAD 56165· COSPAR 2023-050D· Active satellite· Other / Unclassified· LEO

Launch

Launched on Apr 2, 2023 from Space Launch Complex 4E, United States of America aboard a Falcon 9 Block 5.

Falcon 9 Block 5 | SDA Tranche 0A →

Live · TLE epoch 2026-09-08 06:56 UTC

Orbit class

LEO — Low Earth Orbit (circular, < 2,000 km)

Operator

United States Government

Country

United States

Manufacturer

—

Launched

Apr 2, 2023

Mass

—

Apogee

952 km

Perigee

926 km

Inclination

81.01°

Period

1.73 h

Altitude history

Apogee and perigee for CHECKMATE 6 across 14 days of archived orbital elements (15 element sets, one per day).

Trend

Decaying

Change

-2.0 km

Rate

-0.14 km/day

Now

926 × 952 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

9 other catalogued objects still in orbit from launch 2023-050 (Falcon 9 Block 5 | SDA Tranche 0A).

CHECKMATE 8 · 56162
CHECKMATE 5 · 56163
CHECKMATE 4 · 56164
CHECKMATE 7 · 56166
CHECKMATE 2 · 56167
CHECKMATE 1 · 56168
CHECKMATE 3 · 56169
BB 2 · 56170
BB 1 · 56171

Sources & further reading

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