NATIONAL AERONAUTICS AND SPACE ADMINISTRATION

Scout X-4 | Explorer 24 & 25

SUCCESSNov 21, 1964 at 17:09 UTCScout X-4 →
PADSpace Launch Complex 5
SITEVandenberg SFB, CA, USA →
ORBITElliptical Orbit
TYPEEarth Science

Explorer 24 was placed in orbit together with Explorer 25 from a single launch vehicle. Explorer 24 was identical in configuration to the previously launched balloon satellites Explorer 9 and 19. The spacecraft was 3.6 m in diameter, was built of alternating layers of aluminum foil and plastic film, and was covered uniformly with 5.1-cm white dots for thermal control. It was designed to yield atmospheric density near perigee as a function of space and time from sequential observations of the sphere’s position in orbit.

VEHICLE
Scout X-4
MISSION
Explorer 24 & 25
MISSION TYPE
Earth Science
TARGET ORBIT
Elliptical Orbit
COUNTRY
USA
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: fb048759-edaa-4bc1-ab7a-2043cf01e5b1
Reported date: Nov 21, 1964 at 17:09 UTC
Last synced: 8 hours ago
This launch date and time are confirmed by the launch provider. Countdown is active.
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MANUFACTURER
Vought
VARIANT
4
FLIGHTS
12
SUCCESSES
11
SUCCESS RATE
91.7%

The Scout family of rockets were were American launch vehicles designed to place small satellites into orbit around the Earth. The Scout multistage rocket was the first orbital launch vehicle to be entirely composed of solid fuel stages.

When is the Scout X-4 | Explorer 24 & 25 launch?
The Scout X-4 | Explorer 24 & 25 is scheduled for Saturday, November 21, 1964 at 5:09 PM UTC. This is the NET (No Earlier Than) time and may be subject to change. Current status: SUCCESS.
What rocket is being used for Explorer 24 & 25?
The Scout X-4 | Explorer 24 & 25 mission uses the Scout X-4 rocket, manufactured by Vought. The Scout X-4 has flown 12 times with a 91.7% success rate.
Where is the Scout X-4 | Explorer 24 & 25 launching from?
The launch takes place from Space Launch Complex 5 at Vandenberg SFB, CA, USA.
What orbit is Explorer 24 & 25 going to?
The Explorer 24 & 25 mission is targeting Elliptical Orbit.
Who is launching Explorer 24 & 25?
The Scout X-4 | Explorer 24 & 25 is operated by National Aeronautics and Space Administration.
Can I watch the Scout X-4 | Explorer 24 & 25 launch live?
Yes. Visit the launch detail page on Space Launch Live for embedded YouTube webcasts, replay videos, and links to live coverage from SpaceX, NASA, NASASpaceflight, and other channels.
Mar 28, 2026 20:13 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 28, 2026 20:13 UTC
Launch date set: Nov 21, 1964 at 17:09 UTC
NET (No Earlier Than) confirmed by National Aeronautics and Space Administration
Mar 28, 2026 20:13 UTC
Launch completed successfully
Updated via Launch Library 2
Last data sync: 8 hours ago
Launch Library 28 hours ago
Launch ID: fb048759-edaa-4bc1-ab7a-2043cf01e5b1
Open-Meteo Weather9 hours ago
Pad weather at 34.61, -120.62