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ASTRA 1B, 21139

Orbit data source: Space-Track

ASTRA 1B, 21139 is a payload satellite owned by SES (LU) in GEO that was launched on Sat, 02 Mar 1991 UTC via an ARIANE 44LP launch vehicle from the French Guiana (FRGUI). 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.

Not visible in the next 10 days

Iframe embed code

<iframe src="https://www.satcat.com/sats-embedded/21139?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/21139?theme=dark&initialShowStats=false

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ISO8601 Format

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ISO8601 Format

Identifier

21139, 1991-015A

Orbit

GEO

Country

LU / SES

Related business

Manufacturer

GE/East Windsor

Mission

Non-operational Commercial Communications

Bus & Motor

AS5000, 2X LEROS 1

Mass

2,580 kg wet, 1,177 kg dry

Launch date (UTC)

1991-03-02 (35 years ago)

Launch vehicle

ARIANE 44LP

Launch site

French Guiana (FRGUI)

Object type

Payload

Rocket body

Debris

Shape & HBR

Hex Poly + 2 Pan, 12.2 m

Radar Cross Section

18.796 m², Large (>1 m²)

Expand to show TLE details & history
Last TLE update: 17 hours ago

TLE from 17 hours ago

0 ASTRA 1B
1 21139U 91015A   25348.91281734 -.00000211  00000-0  00000-0 0  9994
2 21139  13.1389  23.5636 0007141 341.4961  32.8675  0.98512149114476

Epoch: 2025-12-14T21:54Z

TLE epoch observation values (Epoch: 2025-12-14T21:54:27.418Z)

Latitude

3.25272°

Longitude

-14.82983°

Altitude

36,260.88 km

Speed

3.058 km/s

True Right ascension

02h 30m 24s

True Declination

3° 14' 58"

Sunlit

Object was in daylight 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

13:24:47

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

36,318.659 km

Perigee altitude

36,257.723 km

Semi-major axis

42,666.328 km

Eccentricity

0.00071

Inclination

13.1389°

RAAN

23.5636°

Arg. of periapsis

341.4961°

True anomaly

32.91194°

Mean anomaly

32.8675°

Eccentric anomaly

32.88972°

Mean motion

0.24627 °/min

Orbital period

1,461.8 mins

BSTAR

0

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Other satellites on launch #15 in the year 1991 (1991-03-02 UTC)

ARIANE 44LP DEB, 41118

ARIANE 44LP DEB, 27662

METEOSAT 5 (MOP 2), 21140

ARIANE 44LP DEB (SPELDA), 21142 (Decayed)

ARIANE 44LP DEB *, 45855

ARIANE 44LP R/B, 21141 (Decayed)

ARIANE 44LP DEB, 23232 (Decayed)

ARIANE 44LP DEB, 27661

ARIANE 44LP DEB, 23236 (Decayed)

METEOSAT 5 AKM, 21904

ARIANE 44LP DEB, 28040

ARIANE 44LP DEB, 25928

ARIANE 44LP DEB, 26371 (Decayed)

ARIANE 44LP DEB, 26794

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

ASTRA 1B Visibility

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21139 neighbors

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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 ASTRA 1B, 21139 on other resources

View ASTRA 1B, 21139 on NASA - NSSDCA Website

View ASTRA 1B, 21139 on Heavens-Above

View ASTRA 1B, 21139 on Keep Track

View ASTRA 1B, 21139 on Celestrak

View ASTRA 1B, 21139 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

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