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 79.779°
Eccentricity 0.14231
RA ascending node 1.055 hr
Argument perigee 196.371°
Mean anomaly 158.646°
Orbital period 119.175 min
Epoch of osculation 16 May 2026, 15:30

See historical orbital elements »

Derived Quantities

Min Altitude 509.4 km
Mean Altitude 1651.0 km
Peak Altitude 2792.6 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

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South El Monte

Latitude:
Longitude:
Timezone:

34.05°N
118.05°W
PDT

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Last updated: 16 May 2026, 18:16 UTC
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