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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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Iframe URL

https://www.satcat.com/sats-embedded/56169?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

56169, 2023-050H

Orbit

LEO

Last TLE update

1 day 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 1 day ago

0 CHECKMATE 3
1 56169U 23050H   25213.52738415  .00000058  00000-0  41491-4 0  9991
2 56169  81.0033  18.0378 0007451  94.6574 265.5433 13.85102237117866

Epoch: 2025-08-01T12:39Z

TLE epoch observation values (Epoch: 2025-08-01T12:39:25.99Z)

Latitude

-0.00006°

Longitude

-122.19713°

Altitude

949.131 km

Speed

7.377 km/s

True Right ascension

01h 12m 09s

True Declination

0° 00' 00"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

-4.94672°

Longitude

57.57867°

Altitude

949.764 km

Speed

7.376 km/s

Apparent Right ascension

14h 08m 12s

Apparent Declination

-21° 59' 37"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

03:34:12

Azimuth

51.916° ENE

Elevation

-64.42°

Doppler factor

Orbital elements

Apogee altitude

948.52 km

Perigee altitude

937.609 km

Semi-major axis

7,321.202 km

Eccentricity

0.00075

Inclination

81.0033°

RAAN

18.0378°

Arg. of periapsis

94.6574°

True anomaly

265.45818°

Mean anomaly

265.5433°

Eccentric anomaly

265.50074°

Mean motion

3.46473 °/min

Orbital period

103.9 mins

BSTAR

0.000041491

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

CHECKMATE 3 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.
11 mins	2025-08-02 22:10:02.446Z	2.394° NNE	2025-08-02 22:16:02.446Z	87.502° E	36.308°	2025-08-02 22:21:02.446Z	148.146° SSE
7 mins	2025-08-02 23:57:02.446Z	312.328° NW	2025-08-03 00:00:02.446Z	275.883° WNW	21.591°	2025-08-03 00:04:02.446Z	228.428° WSW
10 mins	2025-08-03 11:35:02.446Z	182.373° SSW	2025-08-03 11:40:02.446Z	46.016° ENE	43.951°	2025-08-03 11:45:02.446Z	12.22° NNE
4 mins	2025-08-03 13:24:02.446Z	282° WNW	2025-08-03 13:25:02.446Z	292.926° NW	14.168°	2025-08-03 13:28:02.446Z	324.261° NNW

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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Authenticating...

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Check out CHECKMATE 3, 56169 on other resources

View CHECKMATE 3, 56169 on NASA - NSSDCA Website

View CHECKMATE 3, 56169 on Heavens-Above

View CHECKMATE 3, 56169 on Keep Track

View CHECKMATE 3, 56169 on Celestrak

View CHECKMATE 3, 56169 on Gunter's Space Page

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