CAT Satellite Bus
Data current as of 2026-07-20.
The CAT bus accounts for 3 cataloged objects, of which 2 are in orbit and 0 are active. 1 have reentered. Most are built by AERIT/CNEST. The largest operator on this bus is European Space Agency. The first launched in 1979, the most recent in 1981.
2
In orbit
0
Active
3
Total launched
1
Reentered
CAT launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged CAT satellites.
| Manufacturer | AERIT/CNEST |
|---|---|
| Purpose | Vehicle evaluation |
| Launch mass | 1602 kg |
| Dry mass | 1602 kg |
| Length | 2.5 m |
| Diameter | 1.1 m |
| Span | 1.2 m |
| Shape | Cyl |
| Power | Batteries |
| Propulsion | None |
| Design life | 6 days |
| Typical orbit | 319 min period, 10° inclination |
Top operators
Top countries
I-ESA 3
CAT satellites
Track any of them live in KeepTrack.
Frequently asked questions
How many CAT satellites are there?
The catalog lists 3 objects built on the CAT bus. 2 are in orbit and 1 have reentered.
How many CAT satellites are in orbit?
2 CAT objects are currently in orbit, of which 0 carry an active status.
Who builds the CAT bus?
The CAT bus is most commonly built by AERIT/CNEST.
When did the first CAT satellite launch?
The first cataloged CAT satellite launched in 1979, and the most recent in 1981.