United States Air ForceAtlas SLV-3D CentaurLaunch Complex 36B, Cape Canaveral SFS, FL, USA
HEAO 1
Launched
August 12, 1977
Image: NASA Marshall Space Flight Center
Summary
HEAO 1 launched on an United States Air Force Atlas SLV-3D Centaur from Launch Complex 36B, Cape Canaveral SFS, FL, USA on August 12, 1977. It was United States Air Force's 694th launch, 14th this year and humanity's 1,993rd orbital launch attempt. It was the 12th Atlas SLV-3D Centaur flight and the 2nd this year. The payload was bound for low Earth orbit (LEO). HEAO 1, one of 2 catalogued objects, reached a 437 × 457 km orbit inclined 22.8°. 2 objects from this launch are catalogued, one of them a payload.
- Watch
- No webcast on record.
- Vehicle
- Atlas SLV-3D Centaur · United States Air Force
- Booster
- No booster details on record.
- Mission
- Astrophysics · Low Earth Orbit (LEO)
- Milestone
- 12th Atlas SLV-3D Centaur flight · 2nd this yearUnited States Air Force's 694th launch14th this yearhumanity's 1,993rd orbital launch attempt78th orbital launch attempt this year
Flight preview
Orbit: as tracked
HEAO 1 · NORAD 10217 · 1977-075 · Space-Track · tracking 1 of 2 objects
Show the numbers for orbit elements
- Object
- HEAO 1
- Object ID
- 1977-075A
- Epoch
- 1977-08-12 09:16:15 UTC
- Mean motion
- 15.4213058 rev/day
- Eccentricity
- 0.001485
- Inclination
- 22.7557°
- Ascending node
- 237.2696°
- Arg. of perigee
- 294.2584°
- Mean anomaly
- 65.9308°
- 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
2 catalogued: 1 payload, 1 rocket stage; none still in orbit
- HEAO 1 · NORAD 10217 · re-entered March 15, 1979
Centaur AC-45 · re-entered November 25, 1977
Data from J. McDowell, planet4589.org
About this launch
Observatory satellite dedicated to X-ray and gamma-ray studies
Pad
Launch Complex 36B, Cape Canaveral SFS, FL, USA
20th launch from Launch Complex 36B, 1st this year · 327th from Cape Canaveral SFS, FL, USA
76 launches from this pad · 1,131 from Cape Canaveral SFS, FL, USA
385 days after the previous launch from this pad
Questions
When did HEAO 1 launch?
HEAO 1 launched on August 12, 1977. The time is known to the hour, not the minute.
Where can I watch HEAO 1?
No webcast is on record for this launch.
What rocket launched HEAO 1?
Atlas SLV-3D Centaur, flown by United States Air Force. Atlas SLV-3D Centaur spec sheet
Where did HEAO 1 launch from?
Launch Complex 36B, Cape Canaveral SFS, FL, USA.
What orbit did HEAO 1 reach?
HEAO 1, one of 2 catalogued objects, reached a 437 × 457 km orbit inclined 22.8°.
How many satellites did HEAO 1 launch?
1 payload from this launch is catalogued, no longer in orbit (Data from J. McDowell, planet4589.org).