OAO Satellite Bus
Data current as of 2026-07-20.
The OAO bus accounts for 3 cataloged objects, of which 3 are in orbit and 0 are active. Most are built by GRUM. The largest operator on this bus is NASA. The first launched in 1966, the most recent in 1972.
3
In orbit
0
Active
3
Total launched
0
Reentered
OAO launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged OAO satellites.
| Manufacturer | GRUM |
|---|---|
| Purpose | Astronomy, UV |
| Launch mass | 1769 kg |
| Dry mass | 1769 kg |
| Length | 3 m |
| Diameter | 2 m |
| Span | 5 m |
| Shape | Oct Cyl + 2 Pan |
| Power | 2 deployable fixed solar arrays, batteries |
| Equipment | 11 UV telescopes |
| Typical orbit | 99 min period, 35° inclination |
Top operators
Top countries
US 3
OAO satellites
Track any of them live in KeepTrack.
Frequently asked questions
How many OAO satellites are there?
The catalog lists 3 objects built on the OAO bus. 3 are in orbit and 0 have reentered.
How many OAO satellites are in orbit?
3 OAO objects are currently in orbit, of which 0 carry an active status.
Who builds the OAO bus?
The OAO bus is most commonly built by GRUM.
When did the first OAO satellite launch?
The first cataloged OAO satellite launched in 1966, and the most recent in 1972.