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OSCAR 15 (UOSAT 4), 20438

Orbit data source: Space-Track

OSCAR 15 (UOSAT 4), 20438 is a payload satellite owned by SSTL (UK) in SSO that was launched on Mon, 22 Jan 1990 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/20438?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/20438?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

20438, 1990-005C

Orbit

SSO

Last TLE update

12 hours ago

Origin

Airbus Defense and Space (UK)

Manufacturer

SSTL

Mission

Non-operational Commercial Communications

Bus & Motor

UOSAT, Unknown motor

Mass

47 kg wet, 47 kg dry

Launch date (UTC)

1990-01-22 (35 years ago)

Launch vehicle

ARIANE 40

Launch site

French Guiana (FRGUI)

Object type

Payload

Rocket body

Debris

Shape & HBR

Hex Poly, 0.6 m

Radar Cross Section

0.299 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 12 hours ago

0 OSCAR 15 (UOSAT 4)
1 20438U 90005C   25124.91717287  .00000137  00000-0  68710-4 0  9994
2 20438  98.8407 170.3136 0010907 105.2305  67.7571 14.31607673841801

Epoch: 2025-05-04T22:00Z

Definitive object data (Epoch: 2025-05-04T22:00:43.735Z)

Latitude

6.73946°

Longitude

158.14071°

Altitude

785.715 km

Speed

7.463 km/s

True Right ascension

23h 25m 26s

True Declination

6° 41' 59"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

-56.63267°

Longitude

-8.7961°

Altitude

815.673 km

Speed

7.44 km/s

Apparent Right ascension

08h 52m 06s

Apparent Declination

-58° 03' 47"

Sunlit

Object is in full shadow

Visualization observer readout

Local Sidereal Time

18:15:10

Azimuth

220.774° SW

Elevation

-59.181°

Doppler factor

Orbital elements

Apogee altitude

791.323 km

Perigee altitude

775.7 km

Semi-major axis

7,161.648 km

Eccentricity

0.0010907

Inclination

98.8407°

RAAN

170.3136°

Arg. of periapsis

105.2305°

True anomaly

67.87284°

Mean anomaly

67.7571°

Eccentric anomaly

67.81497°

Mean motion

3.58116 °/min

BSTAR

0.00006871

Orbital period

100.53 mins

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Other satellites on launch #5 in the year 1990 (1990-01-22 UTC)

SPOT 2, 20436

OSCAR 14 (UOSAT 3), 20437

OSCAR 16 (PACSAT), 20439

OSCAR 17 (DOVE), 20440

OSCAR 18 (WEBERSAT), 20441

OSCAR 19 (LUSAT), 20442

ARIANE 40 R/B, 20443

OSCAR 15 (UOSAT 4) Visibility forecast

Observer location: undefined°, undefined°

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	2025-05-05 14:36:27.656Z	66.909° ENE	2025-05-05 14:38:27.656Z	92.588° ESE	14.745°	2025-05-05 14:40:27.656Z	118.013° SE
8 mins	2025-05-05 16:14:27.656Z	2.541° NNE	2025-05-05 16:18:27.656Z	269.527° W	40.646°	2025-05-05 16:22:27.656Z	210.353° SW
6 mins	2025-05-06 01:53:27.656Z	101.161° ESE	2025-05-06 01:55:27.656Z	71.209° E	21.552°	2025-05-06 01:59:27.656Z	16.265° NNE
8 mins	2025-05-06 03:31:27.656Z	198.102° SSW	2025-05-06 03:34:27.656Z	247.042° WSW	33.088°	2025-05-06 03:39:27.656Z	330.284° NNW

Authenticating...

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Check out OSCAR 15 (UOSAT 4), 20438 on other resources

View OSCAR 15 (UOSAT 4), 20438 on NASA - NSSDCA Website

View OSCAR 15 (UOSAT 4), 20438 on Heavens-Above

View OSCAR 15 (UOSAT 4), 20438 on Keep Track

View OSCAR 15 (UOSAT 4), 20438 on Celestrak

View OSCAR 15 (UOSAT 4), 20438 on Gunter's Space Page

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