ISS Satellite Bus
Data current as of 2026-07-20.
The ISS bus accounts for 3 cataloged objects, of which 2 are in orbit and 0 are active. 1 have reentered. Most are built by MELCO. The largest operator on this bus is JAXA. The first launched in 1975, the most recent in 1978.
2
In orbit
0
Active
3
Total launched
1
Reentered
ISS launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged ISS satellites.
| Manufacturer | MELCO |
|---|---|
| Purpose | Research, Ionosphere |
| Launch mass | 135 kg |
| Dry mass | 135 kg |
| Length | 0.8 m |
| Diameter | 0.8 m |
| Span | 36.8 m |
| Shape | Cyl + 2 Ant |
| Power | Solar cells, batteries |
| Typical orbit | 105 min period, 69° inclination |
Top operators
Top countries
J 2 IN 1
ISS satellites
Track any of them live in KeepTrack.
Frequently asked questions
How many ISS satellites are there?
The catalog lists 3 objects built on the ISS bus. 2 are in orbit and 1 have reentered.
How many ISS satellites are in orbit?
2 ISS objects are currently in orbit, of which 0 carry an active status.
Who builds the ISS bus?
The ISS bus is most commonly built by MELCO.
When did the first ISS satellite launch?
The first cataloged ISS satellite launched in 1975, and the most recent in 1978.