Spacecraft information: EXPLORER 31

Launch Details
Launched 28 November 1965
Flight ended –
Status Unknown
Launch site Air Force Western Test Range, California, USA
Owner United States
NORAD ID 1806
COSPAR ID 1965-098B
Alternative names ISIS-X
Observing

Current orbital elements

Inclination 79.774°
Eccentricity 0.14224
RA ascending node 4.207 hr
Argument perigee 308.735°
Mean anomaly 39.469°
Orbital period 119.179 min
Epoch of osculation 20 Mar 2026, 08:22

See historical orbital elements »

Derived Quantities

Min Altitude 510.1 km
Mean Altitude 1651.2 km
Peak Altitude 2792.2 km

Launched alongside

ALOUETTE 2 THOR AGENA B R/B THOR AGENA B DEB THOR AGENA B DEB THOR AGENA B DEB THOR AGENA B DEB THOR AGENA B DEB THOR AGENA B DEB ALOUETTE 2 DEB ALOUETTE 2 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
PDT

Color scheme


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Last updated: 22 Mar 2026, 19:56 UTC
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