Key statistics
Satellite OSCAR 27 at a glance.
Uptime
13923
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: 107.072 minutes
Inclination: 90.3707 deg
SMA: 7469.243 km
Apoapsis: 1168.429 km
Periapsis: 1013.786 km
RAAN: 77.5798 deg
Eccentricy: 0.01035201
Argument of periapsis: 355.5542 deg
Mean anomaly: 4.4676 deg
Mean motion: 13.44893568 rev/day
Mean motion (dot): 0.00000142 rev/day2
B* drag term: 0.0002211034 1/REarth
Two-line elements (TLE)
Creation date: Oct. 28, 2025, 7:11 p.m.
Reference frame: TEME
Reference center: EARTH
Epoch: Oct. 28, 2025, 9:14 a.m. UTC
TLE line 0: 0 OSCAR 27
TLE line 1: 1 18361U 87080A 25301.38502155 .00000142 00000-0 22110-3 0 9998
TLE line 2: 2 18361 90.3707 77.5798 0103520 355.5542 4.4676 13.44893568869472
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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