United States Air ForceSM-65D Atlas576B3, Vandenberg SFB, CA, USA
OV1-4 & 5
Launched
March 30, 1966
Image: United States Air Force
Summary
OV1-4 & 5 launched on an United States Air Force SM-65D Atlas from 576B3, Vandenberg SFB, CA, USA on March 30, 1966. It was United States Air Force's 312th launch, 13th this year and humanity's 546th orbital launch attempt. It was the 6th SM-65D Atlas flight and the 1st this year. The payload was bound for low Earth orbit (LEO). The tracked orbit of OV1-4, one of 8 catalogued objects, from April 1, 1966, was 896 × 1,021 km inclined 144.5°. 8 objects from this launch are catalogued, 2 of them payloads.
- Watch
- No webcast on record.
- Vehicle
- SM-65D Atlas · United States Air Force
- Booster
- No booster details on record.
- Mission
- Test Flight · Low Earth Orbit (LEO)
- Milestone
- 6th SM-65D Atlas flight · 1st this yearUnited States Air Force's 312th launch13th this yearhumanity's 546th orbital launch attempt29th orbital launch attempt this year
Flight preview
Orbit: as tracked
OV1-4 · NORAD 2121 · 1966-025 · Space-Track · tracking 1 of 8 objects
Show the numbers for orbit elements
- Object
- OV1-4
- Object ID
- 1966-025A
- Epoch
- 1966-04-01 23:24:21 UTC
- Mean motion
- 13.83539545 rev/day
- Eccentricity
- 0.0085904
- Inclination
- 144.5106°
- Ascending node
- 294.8274°
- Arg. of perigee
- 75.0607°
- Mean anomaly
- 286.0053°
- Element set
- 999
- Rev at epoch
- 36
- B*
- 0.00008793
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LEO.
Catalogued objects
8 catalogued: 2 payloads, 6 components; 6 still in orbit
- OV1-4 · NORAD 2121 · in orbit
- OV1-5 · NORAD 2122 · in orbit
Data from J. McDowell, planet4589.org
About this launch
The OV1 (Orbiting Vehicle 1) were small research satellite to be launched piggy back on Atlas ICBM test flights. They consisted in general of the OV1 satellite and the OV1-PM propulsion module (or upper stage) to reach orbit.
Pad

576B3, Vandenberg SFB, CA, USA
4th launch from 576B3, 1st this year · 209th from Vandenberg SFB, CA, USA
7 launches from this pad · 919 from Vandenberg SFB, CA, USA
176 days after the previous launch from this pad
Questions
When did OV1-4 & 5 launch?
OV1-4 & 5 launched on March 30, 1966. The time is known to the hour, not the minute.
Where can I watch OV1-4 & 5?
No webcast is on record for this launch.
What rocket launched OV1-4 & 5?
SM-65D Atlas, flown by United States Air Force. SM-65D Atlas spec sheet
Where did OV1-4 & 5 launch from?
576B3, Vandenberg SFB, CA, USA.
What orbit did OV1-4 & 5 reach?
The tracked orbit of OV1-4, one of 8 catalogued objects, from April 1, 1966, was 896 × 1,021 km inclined 144.5°.
How many satellites did OV1-4 & 5 launch?
2 payloads from this launch are catalogued, 2 of them still in orbit (Data from J. McDowell, planet4589.org).
