Flexbus Satellite Bus
Data current as of 2026-07-20.
The Flexbus bus accounts for 8 cataloged objects, of which 6 are in orbit and 6 are active. 2 have reentered. Most are built by EASF. The largest operator on this bus is European Space Agency. The first launched in 2000, the most recent in 2025.
6
In orbit
6
Active
8
Total launched
2
Reentered
Flexbus launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged Flexbus satellites.
| Manufacturer | EASF |
|---|---|
| Purpose | Earth Science |
| Launch mass | 473 kg |
| Dry mass | 367 kg |
| Length | 5 m |
| Diameter | 1.5 m |
| Span | 9.3 m |
| Shape | Half hex prism+ boom |
| Power | Solar cells, batteries |
| Propulsion | AOCS 2x40mN |
| Design life | 4 years |
| Equipment | ASM, VFM, EFI, ACC, LRR |
| Typical orbit | 93 min period, 66° inclination |
Top operators
Top countries
I-ESA 4 D 1 ESA 1 I-EU 1 US 1
Flexbus satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| SENTINEL-6B | 66514 | 2025-264A | COPERN/ESA | Nov 17, 2025 | 112 min, 66.0° | Active | ◉ |
| SENTINEL-6 Sentinel-6 Michael Freilich | 46984 | 2020-086A | COPERN/ESA | Nov 21, 2020 | 112 min, 66.0° | Active | ◉ |
| R3D2 R3D2 | 44073 | 2019-016A | DARPA2 | Mar 28, 2019 | 88 min, 39.5° | Reentered | ◉ |
| SWARM C Swarm C | 39453 | 2013-067C | ESA | Nov 22, 2013 | 93 min, 87.3° | Active | ◉ |
| SWARM A Swarm A | 39452 | 2013-067B | ESA | Nov 22, 2013 | 93 min, 87.3° | Active | ◉ |
| SWARM B Swarm B | 39451 | 2013-067A | ESA | Nov 22, 2013 | 94 min, 87.7° | Active | ◉ |
| CRYOSAT 2 CRYOSAT 2 | 36508 | 2010-013A | ESA | Apr 8, 2010 | 99 min, 92.0° | Active | ◉ |
| CHAMP CHAMP | 26405 | 2000-039B | GFZ | Jul 15, 2000 | 87 min, 87.2° | Reentered | ◉ |
Frequently asked questions
How many Flexbus satellites are there?
The catalog lists 8 objects built on the Flexbus bus. 6 are in orbit and 2 have reentered.
How many Flexbus satellites are in orbit?
6 Flexbus objects are currently in orbit, of which 6 carry an active status.
Who builds the Flexbus bus?
The Flexbus bus is most commonly built by EASF.
When did the first Flexbus satellite launch?
The first cataloged Flexbus satellite launched in 2000, and the most recent in 2025.