CHECKMATE 1, 56168
Orbit data source: Space-Track
CHECKMATE 1, 56168 is a payload satellite owned by SDA (US) in LEO that was launched on Sun, 02 Apr 2023 UTC via an FALCON 9 launch vehicle from the Air Force Western Test Range (AFWTR). Payload-class satellites include a variety of spacecraft equipped with specific instruments for various scientific and technological missions. These include communications satellites like Starlink; space stations such as the ISS; scientific satellites like the Hubble; Earth observation satellites from companies like Planet Labs, Umbra, and HawkEye 360; GPS; miniature CubeSats for education and research; and military/defense satellites.
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56168 intel report (Beta)
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Identifier
Orbit
Country
USRelated business
Manufacturer
York Space Sys
Mission
Operational Defense Communications
Bus & Motor
S-CLASS, Unknown motor
Mass
~300 kg wet, ~300 kg dry
Launch date (UTC)
Launch vehicle
Launch site
Object type
Shape & HBR
Box + 1 Pan, 1.0 m
Radar Cross Section
0.945 m², Large (>1 m²)
Expand to show TLE details & historyLast TLE update: 2 days ago
TLE from 2 days ago
0 CHECKMATE 1
1 56168U 23050G 26171.43910972 .00000086 00000-0 65975-4 0 9998
2 56168 81.0044 68.8464 0011297 343.6454 16.4336 13.84952837162541Epoch: 2026-06-20T10:32Z
TLE epoch observation values (Epoch: 2026-06-20T10:32:19.079Z)
Latitude
-0.00003°
Longitude
2.11318°
Altitude
941.292 km
Speed
7.385 km/s
True Right ascension
04h 35m 23s
True Declination
0° 00' 00"
Sunlit
Visualization orbit readout
Latitude
Unknown
Longitude
Unknown
Altitude
Unknown
Speed
Unknown
Apparent Right ascension
Unknown
Apparent Declination
Unknown
Sunlit
Visualization observer readout
Local Sidereal Time
21:43:05
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
951.863 km
Perigee altitude
935.32 km
Semi-major axis
7,321.728 km
Eccentricity
0.00113
Inclination
81.0044°
RAAN
68.8464°
Arg. of periapsis
343.6454°
True anomaly
16.47027°
Mean anomaly
16.4336°
Eccentric anomaly
16.45193°
Mean motion
3.46436 °/min
Orbital period
103.92 mins
BSTAR
0.000065975
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Other satellites on launch #50 in the year 2023 (2023-04-02 UTC)
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You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.CHECKMATE 1 Visibility forecast
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Span | Click to sort rows by Start time (UTC) header in descending order | Start Az. | Max El. time (UTC) | Max El. Az. | Max El. | End time (UTC) | End Az. |
|---|---|---|---|---|---|---|---|
| 7 mins | 2026-06-22 16:25:01.941Z | 123.828° SE | 2026-06-22 16:29:01.941Z | 81.823° E | 16.736° | 2026-06-22 16:32:01.941Z | 49.975° ENE |
| 10 mins | 2026-06-22 18:09:01.941Z | 205.444° SW | 2026-06-22 18:13:01.941Z | 275.524° WNW | 41.739° | 2026-06-22 18:19:01.941Z | 3° NNE |
| 6 mins | 2026-06-23 03:18:01.941Z | 39.684° NE | 2026-06-23 03:20:01.941Z | 62.462° ENE | 17.118° | 2026-06-23 03:24:01.941Z | 105.158° ESE |
| 10 mins | 2026-06-23 05:01:01.941Z | 342.842° N | 2026-06-23 05:06:01.941Z | 254.689° W | 42.571° | 2026-06-23 05:11:01.941Z | 184.533° SSW |
Co-orbital & Co-planar RSOs
Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions
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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings
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