STARLINK-5851, 55947

Orbit data source: Space-Track

STARLINK-5851, 55947 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/55947?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

55947, 2023-037AK

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: 20 hours ago

TLE from 20 hours ago

0 STARLINK-5851
1 55947U 23037AK  25349.76386290  .00249073  00000-0  19259-1 0  9991
2 55947  69.9993 135.8718 0003516 142.8846 217.2558 15.00073481151419

Epoch: 2025-12-15T18:19Z

TLE epoch observation values (Epoch: 2025-12-15T18:19:57.754Z)

Latitude

0°

Longitude

136.22341°

Altitude

571.039 km

Speed

7.575 km/s

True Right ascension

09h 03m 29s

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

12:53:00

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

567.057 km

Perigee altitude

562.175 km

Semi-major axis

6,942.753 km

Eccentricity

0.00035

Inclination

69.9993°

RAAN

135.8718°

Arg. of periapsis

142.8846°

True anomaly

217.23142°

Mean anomaly

217.2558°

Eccentric anomaly

217.24361°

Mean motion

3.75185 °/min

Orbital period

95.95 mins

BSTAR

0.019259

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

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STARLINK-5851 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	2025-12-16 20:28:34.815Z	351.357° N	2025-12-16 20:31:34.815Z	46.252° ENE	34.319°	2025-12-16 20:35:34.815Z	133.598° SE
5 mins	2025-12-17 10:28:34.815Z	152.017° SSE	2025-12-17 10:30:34.815Z	107.241° ESE	26.256°	2025-12-17 10:33:34.815Z	50.985° ENE
5 mins	2025-12-17 12:06:34.815Z	263.3° W	2025-12-17 12:08:34.815Z	300.631° NW	21.049°	2025-12-17 12:11:34.815Z	352.678° N

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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-5851, 55947 on other resources

View STARLINK-5851, 55947 on NASA - NSSDCA Website

View STARLINK-5851, 55947 on Heavens-Above

View STARLINK-5851, 55947 on Keep Track

View STARLINK-5851, 55947 on Celestrak

View STARLINK-5851, 55947 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-5851, 55947

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 20 hours ago

TLE from 20 hours ago

TLE epoch observation values (Epoch: 2025-12-15T18:19:57.754Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

STARLINK-5851 Visibility forecast

Co-orbital & Co-planar RSOs

Check out STARLINK-5851, 55947 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 20 hours ago