STARLINK-5899, 55949

Orbit data source: Space-Track

STARLINK-5899, 55949 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/55949?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

55949, 2023-037AM

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: 11 hours ago

TLE from 11 hours ago

0 STARLINK-5899
1 55949U 23037AM  25349.73584102 -.00001051  00000-0 -80352-4 0  9991
2 55949  70.0002 116.2989 0002269 271.0340  89.0560 14.98326382151893

Epoch: 2025-12-15T17:39Z

TLE epoch observation values (Epoch: 2025-12-15T17:39:36.664Z)

Latitude

0.00008°

Longitude

126.76603°

Altitude

574.465 km

Speed

7.574 km/s

True Right ascension

07h 45m 11s

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

03:12:45

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

571.592 km

Perigee altitude

568.439 km

Semi-major axis

6,948.152 km

Eccentricity

0.00023

Inclination

70.0002°

RAAN

116.2989°

Arg. of periapsis

271.034°

True anomaly

89.082°

Mean anomaly

89.056°

Eccentric anomaly

89.069°

Mean motion

3.74748 °/min

Orbital period

96.06 mins

BSTAR

-0.000080352

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

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STARLINK-5899 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 09:48:54.996Z	187.231° SSW	2025-12-16 09:51:54.996Z	124.903° SE	40.274°	2025-12-16 09:55:54.996Z	33.002° NE
6 mins	2025-12-16 19:51:54.996Z	324.651° NNW	2025-12-16 19:54:54.996Z	220.965° SW	41.031°	2025-12-16 19:57:54.996Z	169.609° 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 STARLINK-5899, 55949 on other resources

View STARLINK-5899, 55949 on NASA - NSSDCA Website

View STARLINK-5899, 55949 on Heavens-Above

View STARLINK-5899, 55949 on Keep Track

View STARLINK-5899, 55949 on Celestrak

View STARLINK-5899, 55949 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-5899, 55949

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 11 hours ago

TLE from 11 hours ago

TLE epoch observation values (Epoch: 2025-12-15T17:39:36.664Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

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

STARLINK-5899 Visibility forecast

Co-orbital & Co-planar RSOs

Check out STARLINK-5899, 55949 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 11 hours ago