Key statistics
Satellite OSCAR 27 at a glance.
Uptime
13968
Days in orbit
Revolutions
≈ 13.4
Per day
Orbit
SSO
Sun Synchronous Orbit
Inclination
90.4
Latest
Satellite identification and parameters
Extended collection of information and parameters for OSCAR 27.
Object identification
Identified? True
Debris? False
Object name: OSCAR 27
International designator: 1987-080A
Object number (NORAD): 18361
Object ID (CCSDS): 18361
Country: UNITED STATES OF AMERICA (US)
Current information (Y/N): Y
RCS size: LARGE
Orbital parameters
Period: 107.071 minutes
Inclination: 90.3742 deg
SMA: 7469.194 km
Apoapsis: 1167.902 km
Periapsis: 1014.217 km
RAAN: 79.254 deg
Eccentricy: 0.01028798
Argument of periapsis: 225.2341 deg
Mean anomaly: 134.0404 deg
Mean motion: 13.44906562 rev/day
Mean motion (dot): 0.00000156 rev/day2
B* drag term: 0.0002449176 1/REarth
Two-line elements (TLE)
Creation date: Dec. 12, 2025, 10:14 a.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Dec. 12, 2025, 5:56 a.m. UTC
TLE line 0: 0 OSCAR 27
TLE line 1: 1 18361U 87080A 25346.24746659 .00000156 00000-0 24492-3 0 9991
TLE line 2: 2 18361 90.3742 79.2540 0102880 225.2341 134.0404 13.44906562875502
Live tracking on map
Real-time ground track for satellite OSCAR 27.
Associated space launch
The Transit-O series of satellites that closely followed the design of Transit 5C-1 were also called “Oscars” (Oscar is the phonetic alphabet for “O”, i. e., operational). They were also called NNS (Navy Navigation Satellite) or shortened NavSat.
OSCAR 27 was lifted into orbit during the mission ‘Scout G-1 | Transit-O 27,29’, on board a Scout G-1 space rocket.
The launch took place on Sept. 16, 1987, 7:22 p.m. from Space Launch Complex 5.
For more information about the launch, click the button.
Scout G-1 | Transit-O 27,29
Agency: N/A
Status: Launch Successful
Launch date: Sept. 16, 1987, 7:22 p.m. UTC
Rocket: Scout G-1
Launch pad: Space Launch Complex 5
Location: Vandenberg SFB, CA, USA
...
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