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CHECKMATE 7, 56166

Orbit data source: Space-Track

CHECKMATE 7, 56166 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/56166?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

56166, 2023-050E

Orbit

LEO

Country

Related business

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 (3 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
Last TLE update: 2 days ago

TLE from 2 days ago

0 CHECKMATE 7
1 56166U 23050E   26171.42987410  .00000077  00000-0  55598-4 0  9996
2 56166  81.0007  68.0347 0014063 307.9849  52.0037 13.87620939162569

Epoch: 2026-06-20T10:19Z

TLE epoch observation values (Epoch: 2026-06-20T10:19:01.122Z)

Latitude

-0.00008°

Longitude

4.6354°

Altitude

933.516 km

Speed

7.388 km/s

True Right ascension

04h 32m 08s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

01:06:05

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

944.479 km

Perigee altitude

923.913 km

Semi-major axis

7,312.333 km

Eccentricity

0.00141

Inclination

81.0007°

RAAN

68.0347°

Arg. of periapsis

307.9849°

True anomaly

52.13083°

Mean anomaly

52.0037°

Eccentric anomaly

52.06725°

Mean motion

3.47104 °/min

Orbital period

103.72 mins

BSTAR

0.000055598

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

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CHECKMATE 7 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.
4 mins	2026-06-22 16:07:28.834Z	101.168° ESE	2026-06-22 16:09:28.834Z	81.168° E	11.894°	2026-06-22 16:11:28.834Z	61.402° ENE
10 mins	2026-06-22 17:48:28.834Z	190.242° SSW	2026-06-22 17:53:28.834Z	331.032° NNW	44.793°	2026-06-22 17:58:28.834Z	8.325° NNE
10 mins	2026-06-23 04:40:28.834Z	351.297° N	2026-06-23 04:44:28.834Z	2.022° NNE	44.609°	2026-06-23 04:50:28.834Z	171.326° S

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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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Check out CHECKMATE 7, 56166 on other resources

View CHECKMATE 7, 56166 on NASA - NSSDCA Website

View CHECKMATE 7, 56166 on Heavens-Above

View CHECKMATE 7, 56166 on Keep Track

View CHECKMATE 7, 56166 on Celestrak

View CHECKMATE 7, 56166 on Gunter's Space Page

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

CHECKMATE 7, 56166

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-20T10:19:01.122Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

CHECKMATE 7 Visibility forecast

Co-orbital & Co-planar RSOs

Check out CHECKMATE 7, 56166 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago