United States Air ForceThor Delta E1Space Launch Complex 2E, Vandenberg SFB, CA, USA
Isis 2
Launched
April 1, 1971
Image: NASA
Summary
Isis 2 launched on an United States Air Force Thor Delta E1 from Space Launch Complex 2E, Vandenberg SFB, CA, USA on April 1, 1971. It was United States Air Force's 545th launch, 9th this year and humanity's 1,199th orbital launch attempt. It was the 17th Thor Delta E1 flight and the 1st this year. The payload was bound for low Earth orbit (LEO). Isis 2, one of 9 catalogued objects, reached a 1,364 × 1,434 km orbit inclined 88.2°. 9 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Vehicle
- Thor Delta E1 · United States Air Force
- Booster
- No booster details on record.
- Mission
- Earth Science · Low Earth Orbit (LEO)
- Milestone
- 17th Thor Delta E1 flight · 1st this yearUnited States Air Force's 545th launch9th this yearhumanity's 1,199th orbital launch attempt28th orbital launch attempt this year
Flight preview
Orbit: as tracked
Isis 2 · NORAD 5104 · 1971-024 · Space-Track · tracking 1 of 9 objects
Show the numbers for orbit elements
- Object
- ISIS 2
- Object ID
- 1971-024A
- Epoch
- 1971-04-01 07:59:07 UTC
- Mean motion
- 12.67470646 rev/day
- Eccentricity
- 0.004512
- Inclination
- 88.1564°
- Ascending node
- 293.4291°
- Arg. of perigee
- 139.7159°
- Mean anomaly
- 220.7253°
- 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
9 catalogued: 1 payload, 1 rocket stage, 7 components; 9 still in orbit
- Isis 2 · NORAD 5104 · in orbit
FW4D · in orbit
Data from J. McDowell, planet4589.org
About this launch
ISIS 2 was an ionospheric observatory instrumented with a sweep- and a fixed-frequency ionosonde, a VLF receiver, energetic and soft particle detectors, an ion mass spectrometer, an electrostatic probe, a retarding potential analyzer, a beacon transmitter, a cosmic noise experiment, and two photometers.
Pad
Space Launch Complex 2E, Vandenberg SFB, CA, USA
44th launch from Space Launch Complex 2E, 1st this year · 362nd from Vandenberg SFB, CA, USA
47 launches from this pad · 919 from Vandenberg SFB, CA, USA
357 days after the previous launch from this pad
Questions
When did Isis 2 launch?
Isis 2 launched on April 1, 1971. The time is known to the hour, not the minute.
Where can I watch Isis 2?
No webcast is on record for this launch.
What rocket launched Isis 2?
Thor Delta E1, flown by United States Air Force. Thor Delta E1 spec sheet
Where did Isis 2 launch from?
Space Launch Complex 2E, Vandenberg SFB, CA, USA.
What orbit did Isis 2 reach?
Isis 2, one of 9 catalogued objects, reached a 1,364 × 1,434 km orbit inclined 88.2°.
How many satellites did Isis 2 launch?
1 payload from this launch is catalogued, still in orbit (Data from J. McDowell, planet4589.org).