United States Air ForceThorad SLV-2G Agena DSpace Launch Complex 3W, Vandenberg SFB, CA, USA
KH-4B 4
Launched
August 7, 1968
Image: NASA
Summary
KH-4B 4 launched on an United States Air Force Thorad SLV-2G Agena D from Space Launch Complex 3W, Vandenberg SFB, CA, USA on August 7, 1968. It was United States Air Force's 455th launch, 22nd this year and humanity's 862nd orbital launch attempt. It was the 14th Thorad SLV-2G Agena D flight and the 6th this year. The payload was bound for low Earth orbit (LEO). It reached a 166 × 265 km orbit inclined 82.1°. One object from this launch is catalogued.
- Watch
- No webcast on record.
- Vehicle
- Thorad SLV-2G Agena D · United States Air Force
- Booster
- No booster details on record.
- Mission
- Government/Top Secret · Low Earth Orbit (LEO)
- Milestone
- 14th Thorad SLV-2G Agena D flight · 6th this yearUnited States Air Force's 455th launch22nd this yearhumanity's 862nd orbital launch attempt74th orbital launch attempt this year
Flight preview
Orbit: as tracked
OPS 5955 · NORAD 3336 · 1968-065 · Space-Track
Show the numbers for orbit elements
- Object
- TBA - TO BE ASSIGNED
- Object ID
- 1968-065A
- Epoch
- 1968-08-08 00:02:58 UTC
- Mean motion
- 16.24251166 rev/day
- Eccentricity
- 0.007493
- Inclination
- 82.1385°
- Ascending node
- 346.6188°
- Arg. of perigee
- 193.2802°
- Mean anomaly
- 166.6395°
- Element set
- 999
- Rev at epoch
- 2
- 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
1 catalogued: 1 payload; none still in orbit
- OPS 5955 · NORAD 3336 · re-entered August 27, 1968
Data from J. McDowell, planet4589.org
About this launch
The KH-4B (Keyhole-4B) was sixth optical reconnaissance satellite version in the Corona-program.
Pad

Space Launch Complex 3W, Vandenberg SFB, CA, USA
30th launch from Space Launch Complex 3W, 2nd this year · 304th from Vandenberg SFB, CA, USA
81 launches from this pad · 919 from Vandenberg SFB, CA, USA
98 days after the previous launch from this pad
Questions
When did KH-4B 4 launch?
KH-4B 4 launched on August 7, 1968. The time is known to the hour, not the minute.
Where can I watch KH-4B 4?
No webcast is on record for this launch.
What rocket launched KH-4B 4?
Thorad SLV-2G Agena D, flown by United States Air Force. Thorad SLV-2G Agena D spec sheet
Where did KH-4B 4 launch from?
Space Launch Complex 3W, Vandenberg SFB, CA, USA.
What orbit did KH-4B 4 reach?
It reached a 166 × 265 km orbit inclined 82.1°.
How many satellites did KH-4B 4 launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).
![Thorad-SLV2G Agena-D (Nimbus 3) [NASA]](/media?u=https%3A%2F%2Fthespacedevs-prod.nyc3.digitaloceanspaces.com%2Fmedia%2Fimages%2Fthorad-slv2g_ag_image_20251102061406.jpg&w=1600)