STARLINK-5918, 55939

Orbit data source: Space-Track

STARLINK-5918, 55939 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Fri, 17 Mar 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/55939?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

55939, 2023-037AB

Orbit

LEO

Country

Related business

SpaceX (US)

Manufacturer

SpaceX/Seattle

Mission

Operational Commercial Communications

Bus & Motor

STARLINK, Unknown motor

Mass

305 kg wet, ~290 kg dry

Launch date (UTC)

2023-03-17 (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, 10.1 m

Radar Cross Section

11.087 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 18 hours ago

TLE from 18 hours ago

0 STARLINK-5918
1 55939U 23037AB  25348.85567488  .00001745  00000-0  15400-3 0  9999
2 55939  69.9992 138.3218 0002077 292.6981  67.3959 14.98332642151273

Epoch: 2025-12-14T20:32Z

TLE epoch observation values (Epoch: 2025-12-14T20:32:10.309Z)

Latitude

0.00003°

Longitude

106.51626°

Altitude

573.917 km

Speed

7.574 km/s

True Right ascension

09h 13m 17s

True Declination

0° 00' 00"

Sunlit

Object was in full shadow 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

13:23:44

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

571.439 km

Perigee altitude

568.553 km

Semi-major axis

6,948.133 km

Eccentricity

0.00021

Inclination

69.9992°

RAAN

138.3218°

Arg. of periapsis

292.6981°

True anomaly

67.41787°

Mean anomaly

67.3959°

Eccentric anomaly

67.40689°

Mean motion

3.74749 °/min

Orbital period

96.06 mins

BSTAR

0.000154

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Other satellites on launch #37 in the year 2023 (2023-03-17 UTC)

FALCON 9 DEB, 55968 (Decayed)

STARLINK-5855, 55917

STARLINK-5848, 55932

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STARLINK-5918 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.
7 mins	2025-12-15 21:07:09.821Z	337.336° NNW	2025-12-15 21:11:09.821Z	140.459° SSE	42.888°	2025-12-15 21:14:09.821Z	154.105° SSE
6 mins	2025-12-16 11:08:09.821Z	182.829° SSW	2025-12-16 11:10:09.821Z	136.681° SSE	39.605°	2025-12-16 11:14:09.821Z	33.55° NE

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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 STARLINK-5918, 55939 on other resources

View STARLINK-5918, 55939 on NASA - NSSDCA Website

View STARLINK-5918, 55939 on Heavens-Above

View STARLINK-5918, 55939 on Keep Track

View STARLINK-5918, 55939 on Celestrak

View STARLINK-5918, 55939 on Gunter's Space Page

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

STARLINK-5918, 55939

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 18 hours ago

TLE from 18 hours ago

TLE epoch observation values (Epoch: 2025-12-14T20:32:10.309Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #37 in the year 2023 (2023-03-17 UTC)

STARLINK-5918 Visibility forecast

Co-orbital & Co-planar RSOs

Check out STARLINK-5918, 55939 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 18 hours ago