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STARLINK-1255, 45399

Orbit data source: Space-Track

STARLINK-1255, 45399 is a payload satellite owned by SpaceX/Seattle (US) in LEO that was launched on Wed, 18 Mar 2020 UTC via an FALCON 9 launch vehicle from the Air Force Eastern Test Range (AFETR). 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 src="https://www.satcat.com/sats-embedded/45399?theme=dark&initialShowStats=false" width="600" height="400" frameborder="0" title="Kayhan Space Satcat Satellite Viewer"></iframe>

Iframe URL

https://www.satcat.com/sats-embedded/45399?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

45399, 2020-019AR

Orbit

LEO

Country

US

Related business

Manufacturer

SpaceX/Seattle

Mission

Partially operational Commercial Communications

Bus & Motor

STARLINK, Unknown motor

Mass

260 kg wet, ~248 kg dry

Launch date (UTC)

2020-03-18 (6 years ago)

Launch vehicle

FALCON 9

Launch site

Air Force Eastern Test Range (AFETR)

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: 17 hours ago

TLE from 17 hours ago

0 STARLINK-1255
1 45399U 20019AR  26127.85753905  .00028455  00000-0  32884-3 0  9994
2 45399  53.0362 175.6005 0006443   5.5994 354.5090 15.61663597339655

Epoch: 2026-05-07T20:34Z

TLE epoch observation values (Epoch: 2026-05-07T20:34:51.373Z)

Latitude

-0.00002°

Longitude

1.18877°

Altitude

379.414 km

Speed

7.686 km/s

True Right ascension

11h 42m 24s

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

21:28:34

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

387.488 km

Perigee altitude

378.775 km

Semi-major axis

6,761.268 km

Eccentricity

0.00064

Inclination

53.0362°

RAAN

175.6005°

Arg. of periapsis

5.5994°

True anomaly

354.50193°

Mean anomaly

354.509°

Eccentric anomaly

354.50547°

Mean motion

3.90392 °/min

Orbital period

92.22 mins

BSTAR

0.00032884

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Computing Atmospheric mass density...

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Other satellites on launch #19 in the year 2020 (2020-03-18 UTC)

STARLINK-1305, 45377

STARLINK-1301, 45361

STARLINK-1283, 45389

FALCON 9 DEB, 45420 (Decayed)

STARLINK-1260, 45404

STARLINK-1265, 45406

STARLINK-1279, 45360

STARLINK-1297, 45395

STARLINK-1263, 45405

FALCON 9 DEB, 45423 (Decayed)

STARLINK-1286, 45417

STARLINK-1307, 45397

STARLINK-1274, 45387

STARLINK-1300, 45374

STARLINK-1213, 45400 (Decayed)

Did you know?

You can import UDL-sourced sensor .json files into the Sandbox to generate a visibility chart that accounts for multi-vendor sensor geometry.

Click here to try in Sandbox

STARLINK-1255 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.
4 mins	2026-05-09 06:36:29.476Z	284.088° WNW	2026-05-09 06:38:29.476Z	344.202° N	23.094°	2026-05-09 06:40:29.476Z	26.884° 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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Click to sort rows by RSO header in ascending order	Click to sort rows by Country header in ascending order	Click to sort rows by Type header in ascending order	Click to sort rows by Inclination Δ header in ascending order	Click to sort rows by RAAN Δ header in ascending order	Click to sort rows by Coplanar Angle header in ascending order	Click to sort rows by SMA Δ header in ascending order	Click to sort rows by Orbital period header in ascending order	Click to sort rows by <5km Md TCA header in descending order

CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out STARLINK-1255, 45399 on other resources

View STARLINK-1255, 45399 on NASA - NSSDCA Website

View STARLINK-1255, 45399 on Heavens-Above

View STARLINK-1255, 45399 on Keep Track

View STARLINK-1255, 45399 on Celestrak

View STARLINK-1255, 45399 on Gunter's Space Page

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

Documentation

Go to standalone docs website

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