Spacecraft information: EXPLORER 40

Launch Details
Launched 7 August 1968
Flight ended –
Status Unknown
Launch site Air Force Western Test Range, California, USA
Owner United States
NORAD ID 3338
COSPAR ID 1968-066B
Alternative names INJUN 5
Observing

Current orbital elements

Inclination 80.660°
Eccentricity 0.11301
RA ascending node 12.967 hr
Argument perigee 228.643°
Mean anomaly 121.197°
Orbital period 117.692 min
Epoch of osculation 27 Jan 2026, 11:17

See historical orbital elements »

Derived Quantities

Min Altitude 685.3 km
Mean Altitude 1584.3 km
Peak Altitude 2483.3 km

Launched alongside

EXPLORER 39 SCOUT B R/B SCOUT B DEB SCOUT B DEB SCOUT B DEB SCOUT B DEB SCOUT B DEB SCOUT B DEB SCOUT B DEB SCOUT B DEB SCOUT B DEB SCOUT B 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: 30 Jan 2026, 19:16 UTC
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