OSO Satellite Bus
Data current as of 2026-07-20.
The OSO bus accounts for 8 cataloged objects, of which 0 are in orbit and 0 are active. 8 have reentered. Most are built by BALL. The largest operator on this bus is NASA. The first launched in 1962, the most recent in 1979.
0
In orbit
0
Active
8
Total launched
8
Reentered
OSO launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged OSO satellites.
| Manufacturer | BALL |
|---|---|
| Launch mass | 208 kg |
| Dry mass | 208 kg |
| Length | 0.9 m |
| Diameter | 1.1 m |
| Span | 2.3 m |
| Shape | Oct Cyl + Sail + 3 Ant |
Top operators
NASA 7 STP/NRL 1
Top countries
US 8
OSO satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| SOLWIND P78-1 | 11278 | 1979-017A | STP/NRL | Feb 24, 1979 | 87 min, 97.8° | Reentered | ◉ |
| OSO 7 OSO 7 | 05491 | 1971-083A | GSFC | Sep 29, 1971 | 87 min, 33.1° | Reentered | ◉ |
| OSO 6 OSO 6 | 04065 | 1969-068A | GSFC | Aug 9, 1969 | 88 min, 32.9° | Reentered | ◉ |
| OSO 5 OSO 5 | 03663 | 1969-006A | GSFC | Jan 22, 1969 | 88 min, 32.9° | Reentered | ◉ |
| OSO 4 OSO 4 | 03000 | 1967-100A | GSFC | Oct 18, 1967 | 87 min, 33.0° | Reentered | ◉ |
| OSO 3 OSO 3 | 02703 | 1967-020A | GSFC | Mar 8, 1967 | 88 min, 32.8° | Reentered | ◉ |
| OSO 2 OSO 2 | 00987 | 1965-007A | GSFC | Feb 3, 1965 | 87 min, 32.8° | Reentered | ◉ |
| OSO 1 OSO 1 | 00255 | 1962-006A | GSFC | Mar 7, 1962 | 87 min, 32.8° | Reentered | ◉ |
Frequently asked questions
How many OSO satellites are there?
The catalog lists 8 objects built on the OSO bus. 0 are in orbit and 8 have reentered.
How many OSO satellites are in orbit?
0 OSO objects are currently in orbit, of which 0 carry an active status.
Who builds the OSO bus?
The OSO bus is most commonly built by BALL.
When did the first OSO satellite launch?
The first cataloged OSO satellite launched in 1962, and the most recent in 1979.