CHECKMATE 6, 56165
Orbit data source: Space-Track
CHECKMATE 6, 56165 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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56165 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 6
1 56165U 23050D 26171.44852259 .00000047 00000-0 30598-4 0 9999
2 56165 81.0048 68.7213 0011316 307.1668 52.8455 13.86594408162552Epoch: 2026-06-20T10:45Z
TLE epoch observation values (Epoch: 2026-06-20T10:45:52.351Z)
Latitude
-0.00004°
Longitude
-1.40983°
Altitude
938.452 km
Speed
7.385 km/s
True Right ascension
04h 34m 53s
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
21:43:26
Azimuth
Unknown
Elevation
Unknown
Doppler factor
Unknown
Orbital elements
Apogee altitude
946.086 km
Perigee altitude
929.528 km
Semi-major axis
7,315.944 km
Eccentricity
0.00113
Inclination
81.0048°
RAAN
68.7213°
Arg. of periapsis
307.1668°
True anomaly
52.94894°
Mean anomaly
52.8455°
Eccentric anomaly
52.89721°
Mean motion
3.46847 °/min
Orbital period
103.79 mins
BSTAR
0.000030598
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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 6 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. |
|---|---|---|---|---|---|---|---|
| 8 mins | 2026-06-22 16:34:23.562Z | 131.538° SE | 2026-06-22 16:38:23.562Z | 87.766° E | 20.149° | 2026-06-22 16:42:23.562Z | 42.926° NE |
| 10 mins | 2026-06-22 18:18:23.562Z | 212.229° SW | 2026-06-22 18:23:23.562Z | 300.653° NW | 37.728° | 2026-06-22 18:28:23.562Z | 358.596° N |
| 7 mins | 2026-06-23 03:26:23.562Z | 30.368° NE | 2026-06-23 03:29:23.562Z | 65.759° ENE | 19.949° | 2026-06-23 03:33:23.562Z | 111.165° ESE |
| 10 mins | 2026-06-23 05:10:23.562Z | 337.209° NNW | 2026-06-23 05:14:23.562Z | 281.457° WNW | 39.173° | 2026-06-23 05:20:23.562Z | 190.2° 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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