Launch Success

Liftoff Time (GMT)

06:29:31

Friday August 12, 1977

Watch Replay

24/7 Coverage

Mission Details

HEAO-1

Wiki

HEAO-1 was an X-ray telescope launched in 1977. HEAO-1 surveyed the sky in the X-ray portion of the electromagnetic spectrum (0.2 keV – 10 MeV), providing nearly constant monitoring of X-ray sources near the ecliptic poles and more detailed studies of a number of objects by observations lasting 3–6 hours. It was the first of NASA's three High Energy Astronomy Observatories.

Low Earth Orbit

1 Payload

2,552 kilograms

Rocket

Retired
Atlas-SLV3D Centaur-D1AR

Active 1975 to 1983


Stages

2

Launch Site

SLC-36B

Cape Canaveral SFS, Florida, USA

Fastest Turnaround

50 days 6 hours

Stats

Atlas-Centaur


41st

Mission

2nd

Mission of 1977

1977


78th

Orbital launch attempt