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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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Iframe URL

https://www.satcat.com/sats-embedded/56165?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

56165, 2023-050D

Orbit

LEO

Last TLE update

15 hours ago

Origin

Space Development Agency (US)

Manufacturer

York Space Sys

Mission

Operational Defense Communications

Bus & Motor

S-CLASS, Unknown motor

Mass

~300 kg wet, ~300 kg dry

Launch date (UTC)

2023-04-02 (2 years ago)

Launch vehicle

FALCON 9

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Box + 1 Pan, 1.0 m

Radar Cross Section

0.945 m², Large (>1 m²)

Expand to show TLE details & history

TLE from 15 hours ago

0 CHECKMATE 6
1 56165U 23050D   25213.71766613  .00000080  00000-0  61111-4 0  9995
2 56165  81.0049  18.2653 0007081  98.3857 261.8103 13.84889567117872

Epoch: 2025-08-01T17:13Z

TLE epoch observation values (Epoch: 2025-08-01T17:13:26.353Z)

Latitude

0.00006°

Longitude

169.34133°

Altitude

950.195 km

Speed

7.376 km/s

True Right ascension

01h 13m 03s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-80.2883°

Longitude

55.68184°

Altitude

979.785 km

Speed

7.359 km/s

Apparent Right ascension

11h 05m 06s

Apparent Declination

-68° 01' 21"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

22:06:51

Azimuth

191.117° SSW

Elevation

-60.792°

Doppler factor

Orbital elements

Apogee altitude

948.999 km

Perigee altitude

938.63 km

Semi-major axis

7,321.952 km

Eccentricity

0.00071

Inclination

81.0049°

RAAN

18.2653°

Arg. of periapsis

98.3857°

True anomaly

261.73°

Mean anomaly

261.8103°

Eccentric anomaly

261.77015°

Mean motion

3.4642 °/min

Orbital period

103.92 mins

BSTAR

0.000061111

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Other satellites on launch #50 in the year 2023 (2023-04-02 UTC)

CHECKMATE 6 Visibility forecast

Observer location: undefined°, undefined°

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	2025-08-02 10:41:35.203Z	130.86° SE	2025-08-02 10:45:35.203Z	82.556° E	21.666°	2025-08-02 10:49:35.203Z	39.065° NE
10 mins	2025-08-02 12:25:35.203Z	216.722° SW	2025-08-02 12:29:35.203Z	275.263° WNW	36.33°	2025-08-02 12:35:35.203Z	357.805° N
8 mins	2025-08-02 21:33:35.203Z	25.608° NE	2025-08-02 21:37:35.203Z	74.78° E	21.392°	2025-08-02 21:41:35.203Z	118.174° SE
9 mins	2025-08-02 23:18:35.203Z	332.235° NNW	2025-08-02 23:22:35.203Z	262.398° W	37.447°	2025-08-02 23:27:35.203Z	195.151° 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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Check out CHECKMATE 6, 56165 on other resources

View CHECKMATE 6, 56165 on NASA - NSSDCA Website

View CHECKMATE 6, 56165 on Heavens-Above

View CHECKMATE 6, 56165 on Keep Track

View CHECKMATE 6, 56165 on Celestrak

View CHECKMATE 6, 56165 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.