CHECKMATE 3, 56169
Orbit data source: Space-Track
CHECKMATE 3, 56169 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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56169 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 3
1 56169U 23050H 26171.41583898 .00000071 00000-0 53394-4 0 9996
2 56169 81.0030 68.3139 0006376 313.7958 46.2671 13.85150288162566Epoch: 2026-06-20T09:58Z
TLE epoch observation values (Epoch: 2026-06-20T09:58:48.487Z)
Latitude
0.00003°
Longitude
9.98109°
Altitude
945.306 km
Speed
7.381 km/s
True Right ascension
04h 33m 15s
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
21:43:01
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
947.563 km
Perigee altitude
938.227 km
Semi-major axis
7,321.032 km
Eccentricity
0.00064
Inclination
81.003°
RAAN
68.3139°
Arg. of periapsis
313.7958°
True anomaly
46.31992°
Mean anomaly
46.2671°
Eccentric anomaly
46.29351°
Mean motion
3.46485 °/min
Orbital period
103.9 mins
BSTAR
0.000053394
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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 3 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. |
|---|---|---|---|---|---|---|---|
| 11 mins | 2026-06-22 17:32:58.413Z | 179.347° S | 2026-06-22 17:38:58.413Z | 90.184° ESE | 43.551° | 2026-06-22 17:43:58.413Z | 15.029° NNE |
| 6 mins | 2026-06-22 19:21:58.413Z | 266.876° W | 2026-06-22 19:24:58.413Z | 300.203° NW | 15.796° | 2026-06-22 19:27:58.413Z | 330.859° NNW |
| 10 mins | 2026-06-23 04:26:58.413Z | 358.392° N | 2026-06-23 04:31:58.413Z | 104.796° ESE | 42.42° | 2026-06-23 04:36:58.413Z | 160.917° S |
| 5 mins | 2026-06-23 06:13:58.413Z | 296.704° NW | 2026-06-23 06:15:58.413Z | 274.256° WNW | 15.721° | 2026-06-23 06:18:58.413Z | 243.018° WSW |
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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