Prima Satellite Bus
Data current as of 2026-07-20.
The Prima bus accounts for 8 cataloged objects, of which 8 are in orbit and 8 are active. Most are built by THALA. The largest operator on this bus is ASI. The first launched in 2007, the most recent in 2026.
8
In orbit
8
Active
8
Total launched
0
Reentered
Prima launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged Prima satellites.
| Manufacturer | THALA |
|---|---|
| Purpose | Earth observation (Radar) |
| Launch mass | 1900 kg |
| Dry mass | 1700 kg |
| Length | 1.4 m |
| Diameter | 1.4 m |
| Span | 12 m |
| Shape | Box + 2 Pan |
| Power | 2 deployable solar arrays, batteries |
| Propulsion | AOCS |
| Design life | 5 years |
| Equipment | X-band (9.6 GHz) synthetic aperture radar (SAR) |
| Typical orbit | 97 min period, 98° inclination |
Top operators
ASI 4 MDDI/ASI 3 CSA 1
Top countries
I 6 CA 1 IT 1
Prima satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| COSMO-SKYMED-FM3 | 67304 | 2026-001A | MDDI/ASI | Jan 3, 2026 | 97 min, 97.9° | Active | ◉ |
| CSG-2 CSG FM2 | 51444 | 2022-008A | MDDI/ASI | Jan 31, 2022 | 97 min, 97.9° | Active | ◉ |
| CSG-1 CSG 1 | 44873 | 2019-092A | MDDI/ASI | Dec 18, 2019 | 97 min, 97.9° | Active | ◉ |
| COSMO-SKYMED 4 COSMO 4 | 37216 | 2010-060A | ASI | Nov 6, 2010 | 97 min, 97.9° | Active | ◉ |
| COSMO-SKYMED 3 COSMO 3 | 33412 | 2008-054A | ASI | Oct 25, 2008 | 96 min, 97.8° | Active | ◉ |
| RADARSAT-2 Radarsat-2 | 32382 | 2007-061A | CSA | Dec 14, 2007 | 101 min, 98.6° | Active | ◉ |
| COSMO-SKYMED 2 COSMO 2 | 32376 | 2007-059A | ASI | Dec 9, 2007 | 97 min, 97.9° | Active | ◉ |
| COSMO-SKYMED 1 COSMO 1 | 31598 | 2007-023A | ASI | Jun 8, 2007 | 96 min, 97.9° | Active | ◉ |
Frequently asked questions
How many Prima satellites are there?
The catalog lists 8 objects built on the Prima bus. 8 are in orbit and 0 have reentered.
How many Prima satellites are in orbit?
8 Prima objects are currently in orbit, of which 8 carry an active status.
Who builds the Prima bus?
The Prima bus is most commonly built by THALA.
When did the first Prima satellite launch?
The first cataloged Prima satellite launched in 2007, and the most recent in 2026.