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OSCAR 18 (WEBERSAT), 20441

Orbit data source: Space-Track

OSCAR 18 (WEBERSAT), 20441 is a payload satellite owned by Weber CAST (US) 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/20441?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/20441?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

20441, 1990-005F

Orbit

SSO

Last TLE update

19 hours ago

Origin

Weber State University (US)

Manufacturer

WEB/AMNA

Mission

Non-operational Commercial Communications

Bus & Motor

MICROSAT, Unknown motor

Mass

12 kg wet, 12 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, 0.3 m

Radar Cross Section

0.087 m², Medium (>0.1 m² and < 1m²)

Expand to show TLE details & history

TLE from 19 hours ago

0 OSCAR 18 (WEBERSAT)
1 20441U 90005F   25124.61133015  .00000251  00000-0  10721-3 0  9991
2 20441  98.8993 136.7873 0010816 344.6110 131.3090 14.33812772843504

Epoch: 2025-05-04T14:40Z

Definitive object data (Epoch: 2025-05-04T14:40:18.924Z)

Latitude

62.70112°

Longitude

-108.46392°

Altitude

794.858 km

Speed

7.459 km/s

True Right ascension

22h 17m 24s

True Declination

62° 33' 41"

Sunlit

Object was in daylight at TLE epoch

Visualization TLE readout

Latitude

-68.78962°

Longitude

-148.87405°

Altitude

805.047 km

Speed

7.45 km/s

Apparent Right ascension

03h 52m 27s

Apparent Declination

-74° 43' 15"

Sunlit

Object is in daylight

Visualization observer readout

Local Sidereal Time

17:36:53

Azimuth

168.844° S

Elevation

-53.176°

Doppler factor

Orbital elements

Apogee altitude

783.902 km

Perigee altitude

768.426 km

Semi-major axis

7,154.301 km

Eccentricity

0.0010816

Inclination

98.8993°

RAAN

136.7873°

Arg. of periapsis

344.611°

True anomaly

131.40202°

Mean anomaly

131.309°

Eccentric anomaly

131.35552°

Mean motion

3.58668 °/min

BSTAR

0.00010721

Orbital period

100.37 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 15 (UOSAT 4), 20438

OSCAR 16 (PACSAT), 20439

OSCAR 17 (DOVE), 20440

OSCAR 19 (LUSAT), 20442

ARIANE 40 R/B, 20443

OSCAR 18 (WEBERSAT) 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.
6 mins	2025-05-05 12:31:17.392Z	58.972° ENE	2025-05-05 12:34:17.392Z	99.834° ESE	17.428°	2025-05-05 12:37:17.392Z	135.975° SSE
7 mins	2025-05-05 14:10:17.392Z	354.455° N	2025-05-05 14:13:17.392Z	289.928° WNW	37.854°	2025-05-05 14:17:17.392Z	217.892° SW
6 mins	2025-05-05 23:47:17.392Z	109.616° ESE	2025-05-05 23:50:17.392Z	60.426° ENE	24.18°	2025-05-05 23:53:17.392Z	17.16° NNE
7 mins	2025-05-06 01:26:17.392Z	210.012° SW	2025-05-06 01:29:17.392Z	268.265° W	29.916°	2025-05-06 01:33:17.392Z	325.731° NNW

Authenticating...

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Check out OSCAR 18 (WEBERSAT), 20441 on other resources

View OSCAR 18 (WEBERSAT), 20441 on NASA - NSSDCA Website

View OSCAR 18 (WEBERSAT), 20441 on Heavens-Above

View OSCAR 18 (WEBERSAT), 20441 on Keep Track

View OSCAR 18 (WEBERSAT), 20441 on Celestrak

View OSCAR 18 (WEBERSAT), 20441 on Gunter's Space Page

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