HEAO Satellite Bus
Data current as of 2026-07-20.
The HEAO bus accounts for 3 cataloged objects, of which 0 are in orbit and 0 are active. 3 have reentered. Most are built by TRW. The largest operator on this bus is NASA. The first launched in 1977, the most recent in 1979.
0
In orbit
0
Active
3
Total launched
3
Reentered
HEAO launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged HEAO satellites.
| Manufacturer | TRW |
|---|---|
| Launch mass | 2514 kg |
| Dry mass | 2393 kg |
| Length | 4.2 m |
| Diameter | 2.7 m |
| Span | 5.4 m |
| Shape | Oct Cyl |
Top operators
Top countries
US 3
HEAO satellites
Track any of them live in KeepTrack.
Frequently asked questions
How many HEAO satellites are there?
The catalog lists 3 objects built on the HEAO bus. 0 are in orbit and 3 have reentered.
How many HEAO satellites are in orbit?
0 HEAO objects are currently in orbit, of which 0 carry an active status.
Who builds the HEAO bus?
The HEAO bus is most commonly built by TRW.
When did the first HEAO satellite launch?
The first cataloged HEAO satellite launched in 1977, and the most recent in 1979.