National Aeronautics and Space AdministrationScout X-4Space Launch Complex 5, Vandenberg SFB, CA, USA
Explorer 19
Launched
December 19, 1963
Image: U.S. Air Force
Summary
Explorer 19 launched on a National Aeronautics and Space Administration Scout X-4 from Space Launch Complex 5, Vandenberg SFB, CA, USA on December 19, 1963. It was National Aeronautics and Space Administration's 49th launch, 4th this year and humanity's 291st orbital launch attempt. It was the 2nd Scout X-4 flight. The payload was bound for low Earth orbit (LEO). Explorer 19, one of 10 catalogued objects, reached a 589 × 2,379 km orbit inclined 78.6°. 10 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Booster
- No booster details on record.
- Mission
- Earth Science · Low Earth Orbit (LEO)
- Milestone
- 2nd Scout X-4 flightNational Aeronautics and Space Administration's 49th launch4th this yearhumanity's 291st orbital launch attempt67th orbital launch attempt this year
Flight preview
Orbit: as tracked
Explorer 19 · NORAD 714 · 1963-053 · Space-Track · tracking 1 of 10 objects
Show the numbers for orbit elements
- Object
- EXPLORER 19 (ADI-1)
- Object ID
- 1963-053A
- Epoch
- 1963-12-19 20:03:15 UTC
- Mean motion
- 12.47088993 rev/day
- Eccentricity
- 0.11395
- Inclination
- 78.62°
- Ascending node
- 78.349°
- Arg. of perigee
- 165.465°
- Mean anomaly
- 198.196°
- Element set
- 999
- Rev at epoch
- 1
- B*
- 0
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LEO. Ascent drawn from padside's representative profile.
Catalogued objects
10 catalogued: 1 payload, 1 rocket stage, 6 debris, 2 components; 3 still in orbit
- Explorer 19 · NORAD 714 · re-entered May 10, 1981
Scout S122R Stage 4 · in orbit
Data from J. McDowell, planet4589.org
About this launch
Explorer 19 was the second in a series of 3.66-m inflatable spheres placed into orbit to determine atmospheric densities.
Pad

Space Launch Complex 5, Vandenberg SFB, CA, USA
10th launch from Space Launch Complex 5, 6th this year · 116th from Vandenberg SFB, CA, USA
69 launches from this pad · 919 from Vandenberg SFB, CA, USA
83 days after the previous launch from this pad
Questions
When did Explorer 19 launch?
Explorer 19 launched on December 19, 1963. The time is known to the hour, not the minute.
Where can I watch Explorer 19?
No webcast is on record for this launch.
What rocket launched Explorer 19?
Scout X-4, flown by National Aeronautics and Space Administration. Scout X-4 spec sheet
Where did Explorer 19 launch from?
Space Launch Complex 5, Vandenberg SFB, CA, USA.
What orbit did Explorer 19 reach?
Explorer 19, one of 10 catalogued objects, reached a 589 × 2,379 km orbit inclined 78.6°.
How many satellites did Explorer 19 launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).
