Discoverer 21

The launch of NASA Thor DM-21 Agena-B took place on 18 Feb 1961, launching the Discoverer 21 mission. The launch site was Vandenberg, California, United States. The payload was deployed in a LEO orbit at an altitude of 634.5.

Primary Orbit Parameters

Orbit Type:

LEO

Altitude:

634.5km

Inclination:

80.7°

Eccentricity:

0.617

Apogee Altitude:

1026km

Perigee Altitude:

243km

LTDN:

Launch Site Location
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