I3K Satellite Bus
Data current as of 2026-07-20.
The I3K bus accounts for 15 cataloged objects, of which 15 are in orbit and 11 are active. Most are built by ISAC. The largest operator on this bus is Indian Space Research Organisation. The first launched in 2005, the most recent in 2025.
15
In orbit
11
Active
15
Total launched
0
Reentered
I3K launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged I3K satellites.
| Manufacturer | ISAC |
|---|---|
| Purpose | Communication |
| Launch mass | 2130 kg |
| Dry mass | 1200 kg |
| Length | 3.1 m |
| Diameter | 1.8 m |
| Span | 15.4 m |
| Shape | Box + 2 Pan |
| Power | 2 deployable solar arrays, batteries |
| Propulsion | ISRO LAM |
| Design life | 15 years |
| Equipment | 12 Ku-band transponders, 12 C-band transponders |
| Typical orbit | 1436 min period, 0° inclination |
Top operators
Top countries
IN 13 F 1 IND 1
I3K satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| NISAR | 65053 | 2025-163A | ISRO/JPL | Jul 30, 2025 | 100 min, 98.4° | Active | ◉ |
| CMS-02 (GSAT 24) GSAT-24 | 52903 | 2022-067A | NSIL | Jun 22, 2022 | 1436 min, 0.1° | Active | ◉ |
| GSAT-30 GSAT-30 | 45026 | 2020-005A | ISRO | Jan 16, 2020 | 1436 min, 0.0° | Active | ◉ |
| GSAT-29 GSAT-29 | 43698 | 2018-089A | ISRO | Nov 14, 2018 | 1436 min, 0.0° | Active | ◉ |
| GSAT-17 GSAT-17 | 42815 | 2017-040B | ISRO | Jun 28, 2017 | 1436 min, 0.0° | Active | ◉ |
| GSAT-19 GSAT-19E | 42747 | 2017-031A | ISRO | Jun 5, 2017 | 1436 min, 0.1° | Active | ◉ |
| GSAT-18 GSAT-18 | 41793 | 2016-060A | ISRO | Oct 5, 2016 | 1436 min, 0.0° | Active | ◉ |
| GSAT-15 GSAT-15 | 41028 | 2015-065A | ISRO | Nov 10, 2015 | 1436 min, 0.1° | Active | ◉ |
| GSAT-16 GSAT-16 | 40332 | 2014-078A | ISRO | Dec 6, 2014 | 1436 min, 0.0° | Active | ◉ |
| GSAT-10 GSAT-10 | 38779 | 2012-051B | ISRO | Sep 28, 2012 | 1436 min, 0.1° | Active | ◉ |
| GSAT-8 GSAT-8 | 37605 | 2011-022A | ISRO | May 20, 2011 | 1436 min, 2.2° | Active | ◉ |
| EUTELSAT 48D Eutelsat W2M | 33460 | 2008-065B | EUTSA | Dec 20, 2008 | 1458 min, 5.4° | Inactive | ◉ |
| INSAT-4CR Insat 4CR | 32050 | 2007-037A | ISRO | Sep 2, 2007 | 1451 min, 6.9° | Inactive | ◉ |
| INSAT-4B Insat 4B | 30793 | 2007-007A | ISRO | Mar 11, 2007 | 1453 min, 6.2° | Inactive | ◉ |
| INSAT-4A Insat 4A | 28911 | 2005-049A | ISRO | Dec 21, 2005 | 1452 min, 6.5° | Inactive | ◉ |
Frequently asked questions
How many I3K satellites are there?
The catalog lists 15 objects built on the I3K bus. 15 are in orbit and 0 have reentered.
How many I3K satellites are in orbit?
15 I3K objects are currently in orbit, of which 11 carry an active status.
Who builds the I3K bus?
The I3K bus is most commonly built by ISAC.
When did the first I3K satellite launch?
The first cataloged I3K satellite launched in 2005, and the most recent in 2025.