Key statistics
Satellite OSCAR 18 (WEBERSAT) at a glance.
Uptime
12950
Days in orbit
Revolutions
≈ 14.3
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
98.9
Latest
Satellite identification and parameters
Extended collection of information and parameters for OSCAR 18 (WEBERSAT).
Object identification
Identified? True
Debris? False
Object name: OSCAR 18 (WEBERSAT)
International designator: 1990-005F
Object number (NORAD): 20441
Object ID (CCSDS): 20441
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 100.43 minutes
Inclination: 98.8966 deg
SMA: 7157.075 km
Apoapsis: 787.378 km
Periapsis: 770.503 km
RAAN: 201.8744 deg
Eccentricy: 0.0011789
Argument of periapsis: 148.4643 deg
Mean anomaly: 283.2546 deg
Mean motion: 14.33835639 rev/day
Mean motion (dot): 0.00000098 rev/day2
B* drag term: 0.000052067 1/REarth
Two-line elements (TLE)
Creation date: July 6, 2025, 10:26 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: July 6, 2025, 9:30 p.m. UTC
TLE line 0: 0 OSCAR 18 (WEBERSAT)
TLE line 1: 1 20441U 90005F 25187.89604237 .00000098 00000-0 52067-4 0 9998
TLE line 2: 2 20441 98.8966 201.8744 0011789 148.4643 283.2546 14.33835639852809
Live tracking on map
Real-time ground track for satellite OSCAR 18 (WEBERSAT).
In-orbit conjunctions
A list of the most updated potential collisions computed for object OSCAR 18 (WEBERSAT).
Associated space launch
French Earth observation satellite
OSCAR 18 (WEBERSAT) was lifted into orbit during the mission ‘Ariane 40 | SPOT 2’, on board a Ariane 40 space rocket.
The launch took place on Jan. 22, 1990, 1:35 a.m. from Ariane Launch Area 2.
For more information about the launch, click the button.
Ariane 40 | SPOT 2
Agency: N/A
Status: Launch Successful
Launch date: Jan. 22, 1990, 1:35 a.m. UTC
Rocket: Ariane 40
Launch pad: Ariane Launch Area 2
Location: Guiana Space Centre, French Guiana
...
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