OSCAR Satellite Bus
Data current as of 2026-07-20.
The OSCAR bus accounts for 4 cataloged objects, of which 1 are in orbit and 0 are active. 3 have reentered. Most are built by OSCAR. The largest operator on this bus is OSCAR. The first launched in 1961, the most recent in 1965.
1
In orbit
0
Active
4
Total launched
3
Reentered
OSCAR launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged OSCAR satellites.
| Manufacturer | OSCAR |
|---|---|
| Purpose | Amateur radio communication |
| Launch mass | 5 kg |
| Dry mass | 5 kg |
| Length | 0.1 m |
| Diameter | 0.2 m |
| Span | 0.3 m |
| Shape | Box |
| Power | Solar cells, batteries |
| Propulsion | None |
| Typical orbit | 102 min period, 70° inclination |
Top operators
OSCAR 4
Top countries
US 4
OSCAR satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| OSCAR 4 (OSCAR IV) OSCAR 4 | 01902 | · | OSCAR | Dec 21, 1965 | · | Reentered | ◉ |
| OSCAR 3 (OSCAR III) OSCAR 3 | 01293 | 1965-016F | OSCAR | Mar 9, 1965 | 102 min, 70.1° | Inactive | ◉ |
| OSCAR 2 (OSCAR II) OSCAR 2 | 00305 | 1962-022B | OSCAR | Jun 2, 1962 | 89 min, 74.3° | Reentered | ◉ |
| OSCAR 1 OSCAR 1 | 00214 | 1961-034B | OSCAR | Dec 12, 1961 | 89 min, 81.1° | Reentered | ◉ |
Frequently asked questions
How many OSCAR satellites are there?
The catalog lists 4 objects built on the OSCAR bus. 1 are in orbit and 3 have reentered.
How many OSCAR satellites are in orbit?
1 OSCAR objects are currently in orbit, of which 0 carry an active status.
Who builds the OSCAR bus?
The OSCAR bus is most commonly built by OSCAR.
When did the first OSCAR satellite launch?
The first cataloged OSCAR satellite launched in 1961, and the most recent in 1965.