IGS-O Satellite Bus
Data current as of 2026-07-20.
The IGS-O bus accounts for 10 cataloged objects, of which 6 are in orbit and 6 are active. 4 have reentered. Most are built by MELCO. The largest operator on this bus is CSICE. The first launched in 2003, the most recent in 2024.
6
In orbit
6
Active
10
Total launched
4
Reentered
IGS-O launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged IGS-O satellites.
| Manufacturer | MELCO |
|---|---|
| Purpose | Reconnaissance, optical |
| Launch mass | 1500 kg |
| Dry mass | 1000 kg |
| Length | 3 m |
| Diameter | 4 m |
| Span | 16.5 m |
| Shape | Box + 2 Pan |
| Propulsion | ? |
| Design life | 5 years |
| Equipment | ? |
| Typical orbit | 0° inclination |
Top operators
CSICE 10
Top countries
J 10
IGS-O satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| IGS O-8 JSE kougaku 8 gouki | 58762 | 2024-010A | CSICE | Jan 12, 2024 | · | Active | ◉ |
| IGS O-7 JSE kougaku 7 gouki | 45165 | 2020-009A | CSICE | Feb 9, 2020 | · | Active | ◉ |
| IGS O-6 JSE kougaku 6 gouki | 43223 | 2018-021A | CSICE | Feb 27, 2018 | · | Active | ◉ |
| IGS O-5 JSE kougaku 5 gouki | 40538 | 2015-015A | CSICE | Mar 26, 2015 | · | Active | ◉ |
| IGS 8B JSE jissho eisei | 39062 | 2013-002B | CSICE | Jan 27, 2013 | 87 min, 97.2° | Reentered | ◉ |
| IGS 6A JSE kougaku 4 gouki | 37813 | 2011-050A | CSICE | Sep 23, 2011 | · | Active | ◉ |
| IGS 5A JSE kougaku-3 gouki | 36104 | 2009-066A | CSICE | Nov 28, 2009 | · | Active | ◉ |
| IGS 4B JSE kougaku-3 g jissho eisei | 30587 | 2007-005B | CSICE | Feb 24, 2007 | 94 min, 97.3° | Reentered | ◉ |
| IGS 3A JSE kougaku-2 gouki | 29393 | 2006-037A | CSICE | Sep 11, 2006 | 87 min, 97.4° | Reentered | ◉ |
| IGS 1A JSE kougaku-1 gouki | 27698 | 2003-009A | CSICE | Mar 28, 2003 | · | Reentered | ◉ |
Frequently asked questions
How many IGS-O satellites are there?
The catalog lists 10 objects built on the IGS-O bus. 6 are in orbit and 4 have reentered.
How many IGS-O satellites are in orbit?
6 IGS-O objects are currently in orbit, of which 6 carry an active status.
Who builds the IGS-O bus?
The IGS-O bus is most commonly built by MELCO.
When did the first IGS-O satellite launch?
The first cataloged IGS-O satellite launched in 2003, and the most recent in 2024.