Key statistics
Satellite OSCAR 15 (UOSAT 4) at a glance.
Uptime
13005
Days in orbit
Revolutions
≈ 14.3
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
98.8
Latest
Satellite identification and parameters
Extended collection of information and parameters for OSCAR 15 (UOSAT 4).
Object identification
Identified? True
Debris? False
Object name: OSCAR 15 (UOSAT 4)
International designator: 1990-005C
Object number (NORAD): 20438
Object ID (CCSDS): 20438
Country: UNITED KINGDOM (UK)
Current information (Y/N): Y
RCS size: MEDIUM
Orbital parameters
Period: 100.584 minutes
Inclination: 98.8308 deg
SMA: 7164.41 km
Apoapsis: 793.983 km
Periapsis: 778.566 km
RAAN: 290.3763 deg
Eccentricy: 0.00107597
Argument of periapsis: 118.7625 deg
Mean anomaly: 55.0091 deg
Mean motion: 14.31634469 rev/day
Mean motion (dot): 0.00000119 rev/day2
B* drag term: 0.000061724164 1/REarth
Two-line elements (TLE)
Creation date: Aug. 31, 2025, 2:26 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Aug. 30, 2025, 9:25 p.m. UTC
TLE line 0: 0 OSCAR 15 (UOSAT 4)
TLE line 1: 1 20438U 90005C 25242.89252181 .00000119 00000-0 61724-4 0 9997
TLE line 2: 2 20438 98.8308 290.3763 0010760 118.7625 55.0091 14.31634469858685
Live tracking on map
Real-time ground track for satellite OSCAR 15 (UOSAT 4).
In-orbit conjunctions
There are no conjunctions computed for OSCAR 15 (UOSAT 4), at the moment. Check back to stay up to date, as we update our databases every day.
Go to all conjunctionsAssociated space launch
French Earth observation satellite
OSCAR 15 (UOSAT 4) 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
...
Latest news about this satellite
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