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OSCAR 22 (UOSAT 5), 21575

Orbit data source: Space-Track

OSCAR 22 (UOSAT 5), 21575 is a payload satellite owned by SSTL (UK) in SSO that was launched on Wed, 17 Jul 1991 UTC via an ARIANE 40 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.

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<iframe src="https://www.satcat.com/sats-embedded/21575?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/21575?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

21575, 1991-050B

Orbit

SSO

Country

Related business

Airbus Defense and Space (FR)

Manufacturer

SSTL

Mission

Non-operational Commercial Communications

Bus & Motor

UOSAT, Unknown motor

Mass

48 kg wet, 48 kg dry

Launch date (UTC)

1991-07-17 (35 years ago)

Launch vehicle

ARIANE 40

Launch site

French Guiana (FRGUI)

Object type

Payload

Rocket body

Debris

Shape & HBR

Hex Poly, 0.3 m

Radar Cross Section

0.299 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history
Last TLE update: 2 days ago

TLE from 2 days ago

0 OSCAR 22 (UOSAT 5)
1 21575U 91050B   26171.43728596  .00000119  00000-0  48848-4 0  9993
2 21575  98.3501 239.8407 0007619 156.1993 203.9551 14.42373606835016

Epoch: 2026-06-20T10:29Z

TLE epoch observation values (Epoch: 2026-06-20T10:29:41.506Z)

Latitude

-0.00002°

Longitude

173.76584°

Altitude

758.589 km

Speed

7.473 km/s

True Right ascension

15h 59m 21s

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

00:29:14

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

753.208 km

Perigee altitude

742.349 km

Semi-major axis

7,125.916 km

Eccentricity

0.00076

Inclination

98.3501°

RAAN

239.8407°

Arg. of periapsis

156.1993°

True anomaly

203.91968°

Mean anomaly

203.9551°

Eccentric anomaly

203.93739°

Mean motion

3.60813 °/min

Orbital period

99.77 mins

BSTAR

0.000048848

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Other satellites on launch #50 in the year 1991 (1991-07-17 UTC)

TUBSAT A, 21577

SARA DEB, 29501 (Decayed)

ERS 1 DEB, 35259

SARA DEB, 28844 (Decayed)

ERS 1 DEB, 35261 (Decayed)

ERS 1 DEB, 35258 (Decayed)

ERS 1 DEB, 42669 (Decayed)

ERS 1 DEB, 35260

ERS 1 DEB, 48172 (Decayed)

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

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OSCAR 22 (UOSAT 5) 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.
6 mins	2026-06-22 16:22:44.483Z	54.523° ENE	2026-06-22 16:25:44.483Z	96.965° ESE	18.414°	2026-06-22 16:28:44.483Z	136.441° SSE
8 mins	2026-06-22 18:00:44.483Z	355.239° N	2026-06-22 18:04:44.483Z	276.75° WNW	34.714°	2026-06-22 18:08:44.483Z	219.037° SW
5 mins	2026-06-23 03:35:44.483Z	100.382° ESE	2026-06-23 03:37:44.483Z	66.535° ENE	22.71°	2026-06-23 03:40:44.483Z	21.238° NNE
8 mins	2026-06-23 05:12:44.483Z	201.782° SSW	2026-06-23 05:15:44.483Z	248.633° W	30.392°	2026-06-23 05:20:44.483Z	329.14° NNW

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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 OSCAR 22 (UOSAT 5), 21575 on other resources

View OSCAR 22 (UOSAT 5), 21575 on NASA - NSSDCA Website

View OSCAR 22 (UOSAT 5), 21575 on Heavens-Above

View OSCAR 22 (UOSAT 5), 21575 on Keep Track

View OSCAR 22 (UOSAT 5), 21575 on Celestrak

View OSCAR 22 (UOSAT 5), 21575 on Gunter's Space Page

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

OSCAR 22 (UOSAT 5), 21575

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 2 days ago

TLE from 2 days ago

TLE epoch observation values (Epoch: 2026-06-20T10:29:41.506Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #50 in the year 1991 (1991-07-17 UTC)

OSCAR 22 (UOSAT 5) Visibility forecast

Co-orbital & Co-planar RSOs

Check out OSCAR 22 (UOSAT 5), 21575 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 2 days ago