United States Air ForceThor Burner 2ASpace Launch Complex 10W, Vandenberg SFB, CA, USA
DSAP-5B F1
Launched
October 14, 1971
Image: Gunter's Space Page
Summary
DSAP-5B F1 launched on an United States Air Force Thor Burner 2A from Space Launch Complex 10W, Vandenberg SFB, CA, USA on October 14, 1971. It was United States Air Force's 557th launch, 21st this year and humanity's 1,269th orbital launch attempt. It was the 1st Thor Burner 2A flight. The payload was bound for Sun-Synchronous Orbit (SSO). DMSP 4527, one of 2 catalogued objects, reached a 801 × 883 km orbit inclined 98.9°. 2 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Vehicle
- Thor Burner 2A · United States Air Force
- Booster
- No booster details on record.
- Mission
- Government/Top Secret · Sun-Synchronous Orbit (SSO)
- Milestone
- 1st Thor Burner 2A flightUnited States Air Force's 557th launch21st this yearhumanity's 1,269th orbital launch attempt98th orbital launch attempt this year
Flight preview
Orbit: as tracked
DMSP 4527 · NORAD 5557 · 1971-087 · Space-Track · tracking 1 of 2 objects
Show the numbers for orbit elements
- Object
- OPS 4311 (DMSP 5B F1)
- Object ID
- 1971-087A
- Epoch
- 1971-10-14 15:42:39 UTC
- Mean motion
- 14.17165852 rev/day
- Eccentricity
- 0.005665
- Inclination
- 98.9455°
- Ascending node
- 194.4403°
- Arg. of perigee
- 244.7374°
- Mean anomaly
- 114.7871°
- Element set
- 999
- Rev at epoch
- 5
- B*
- 0
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: SSO. Ascent drawn from padside's representative profile.
Catalogued objects
2 catalogued: 1 payload, 1 rocket stage; 2 still in orbit
- DMSP 4527 · NORAD 5557 · in orbit
Burner IIA No. 10 US SV-1 · in orbit
Data from J. McDowell, planet4589.org
About this launch
Military meteorological satellite
Pad

Space Launch Complex 10W, Vandenberg SFB, CA, USA
19th launch from Space Launch Complex 10W, 3rd this year · 370th from Vandenberg SFB, CA, USA
31 launches from this pad · 919 from Vandenberg SFB, CA, USA
127 days after the previous launch from this pad
Questions
When did DSAP-5B F1 launch?
DSAP-5B F1 launched on October 14, 1971. The time is known to the hour, not the minute.
Where can I watch DSAP-5B F1?
No webcast is on record for this launch.
What rocket launched DSAP-5B F1?
Thor Burner 2A, flown by United States Air Force. Thor Burner 2A spec sheet
Where did DSAP-5B F1 launch from?
Space Launch Complex 10W, Vandenberg SFB, CA, USA.
What orbit did DSAP-5B F1 reach?
DMSP 4527, one of 2 catalogued objects, reached a 801 × 883 km orbit inclined 98.9°.
How many satellites did DSAP-5B F1 launch?
1 payload from this launch is catalogued, still in orbit (Data from J. McDowell, planet4589.org).
