Spacecraft information: OSCAR 27

Launch Details
Launched 15 September 1987
Flight ended –
Status Unknown
Category Navy Navigation Satellite System (NNSS)
Launch site Air Force Western Test Range, California, USA
Owner United States
NORAD ID 18361
COSPAR ID 1987-080A
Observing

Current orbital elements

Inclination 90.368°
Eccentricity 0.01058
RA ascending node 5.410 hr
Argument perigee 80.620°
Mean anomaly 280.689°
Orbital period 107.070 min
Epoch of osculation 01 Feb 2026, 03:16

See historical orbital elements »

Derived Quantities

Min Altitude 1019.1 km
Mean Altitude 1098.2 km
Peak Altitude 1177.2 km

Launched alongside

OSCAR 29 SCOUT G-1 R/B SCOUT G-1 DEB SCOUT G-1 DEB SCOUT G-1 DEB SCOUT G-1 DEB SCOUT G-1 DEB SCOUT G-1 DEB SCOUT G-1 DEB SCOUT G-1 DEB SCOUT G-1 DEB SCOUT G-1 DEB

Orbital History

Drag the graphs below left or right to change the time range, or use your scroll wheel to zoom in or out.

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South El Monte

Latitude:
Longitude:
Timezone:

34.05°N
118.05°W
PST

Color scheme


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Last updated: 01 Feb 2026, 19:15 UTC
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