Key statistics
Satellite OSCAR 18 (WEBERSAT) at a glance.
Uptime
13054
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: 100.426 minutes
Inclination: 98.8956 deg
SMA: 7156.911 km
Apoapsis: 786.445 km
Periapsis: 771.107 km
RAAN: 307.8691 deg
Eccentricy: 0.00107153
Argument of periapsis: 206.4709 deg
Mean anomaly: 214.4999 deg
Mean motion: 14.33885033 rev/day
Mean motion (dot): 0.00000261 rev/day2
B* drag term: 0.00011064496 1/REarth
Two-line elements (TLE)
Creation date: Oct. 18, 2025, 2:17 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 17, 2025, 11:04 p.m. UTC
TLE line 0: 0 OSCAR 18 (WEBERSAT)
TLE line 1: 1 20441U 90005F 25290.96135381 .00000261 00000-0 11064-3 0 9993
TLE line 2: 2 20441 98.8956 307.8691 0010715 206.4709 214.4999 14.33885033867348
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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