Key statistics
Satellite OSCAR 27 at a glance.
Uptime
13868
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: 107.073 minutes
Inclination: 90.3651 deg
SMA: 7469.294 km
Apoapsis: 1169.337 km
Periapsis: 1012.982 km
RAAN: 75.5321 deg
Eccentricy: 0.01046655
Argument of periapsis: 153.4485 deg
Mean anomaly: 207.2078 deg
Mean motion: 13.44879567 rev/day
Mean motion (dot): 0.00000175 rev/day2
B* drag term: 0.00027357993 1/REarth
Two-line elements (TLE)
Creation date: Sept. 2, 2025, 11:42 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Sept. 2, 2025, 2:02 p.m. UTC
TLE line 0: 0 OSCAR 27
TLE line 1: 1 18361U 87080A 25245.58534029 .00000175 00000-0 27358-3 0 9997
TLE line 2: 2 18361 90.3651 75.5321 0104665 153.4485 207.2078 13.44879567861971
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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