STARLINK-5508, 55639

Orbit data source: Space-Track

STARLINK-5508, 55639 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Fri, 17 Feb 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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https://www.satcat.com/sats-embedded/55639?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

55639, 2023-021M

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)

2023-02-17 (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

13.562 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 8 hours ago

TLE from 8 hours ago

0 STARLINK-5508
1 55639U 23021M   26091.40080539 -.00000155  00000-0 -52286-5 0  9994
2 55639  69.9990 127.1841 0003367 269.2513  90.8260 14.98331063172196

Epoch: 2026-04-01T09:37Z

TLE epoch observation values (Epoch: 2026-04-01T09:37:09.585Z)

Latitude

-0.00006°

Longitude

153.12997°

Altitude

574.511 km

Speed

7.574 km/s

True Right ascension

08h 28m 44s

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

22:57:19

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

572.34 km

Perigee altitude

567.662 km

Semi-major axis

6,948.138 km

Eccentricity

0.00034

Inclination

69.999°

RAAN

127.1841°

Arg. of periapsis

269.2513°

True anomaly

90.86458°

Mean anomaly

90.826°

Eccentric anomaly

90.84529°

Mean motion

3.74749 °/min

Orbital period

96.06 mins

BSTAR

-0.0000052286

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Other satellites on launch #21 in the year 2023 (2023-02-17 UTC)

STARLINK-5326, 55656 (Decayed)

FALCON 9 DEB, 55681 (Decayed)

FALCON 9 DEB, 55679 (Decayed)

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STARLINK-5508 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	2026-04-02 03:22:28.356Z	179.08° S	2026-04-02 03:25:28.356Z	117.526° SE	35.815°	2026-04-02 03:29:28.356Z	37.185° NE
6 mins	2026-04-02 13:25:28.356Z	331.577° NNW	2026-04-02 13:28:28.356Z	189.267° SSW	43.42°	2026-04-02 13:31:28.356Z	161.457° 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-5508, 55639 on other resources

View STARLINK-5508, 55639 on NASA - NSSDCA Website

View STARLINK-5508, 55639 on Heavens-Above

View STARLINK-5508, 55639 on Keep Track

View STARLINK-5508, 55639 on Celestrak

View STARLINK-5508, 55639 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-5508, 55639

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 8 hours ago

TLE from 8 hours ago

TLE epoch observation values (Epoch: 2026-04-01T09:37:09.585Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #21 in the year 2023 (2023-02-17 UTC)

STARLINK-5508 Visibility forecast

Co-orbital & Co-planar RSOs

Check out STARLINK-5508, 55639 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 8 hours ago