SY Satellite Bus
Data current as of 2026-07-20.
The SY bus accounts for 4 cataloged objects, of which 4 are in orbit and 4 are active. Most are built by DFH/HARB. The largest operator on this bus is CASC. The first launched in 2004, the most recent in 2013.
4
In orbit
4
Active
4
Total launched
0
Reentered
SY launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged SY satellites.
| Manufacturer | DFH/HARB |
|---|---|
| Purpose | Earth observation |
| Launch mass | 200 kg |
| Dry mass | 200 kg |
| Length | 1 m |
| Diameter | 1 m |
| Span | 3 m |
| Shape | Box + 2 Pan |
| Power | 2 deployable fixed solar arrays, batteries |
| Design life | Operational as of February 2025. |
| Equipment | Equipped with a teleoperated robotic arm designed to capture other space objects. |
| Typical orbit | 101 min period, 98° inclination |
Top operators
CASC 3 CNSA 1
Top countries
CN 4
SY satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| SHIYAN 7 (SY-7) Shiyan Weixing 7 | 39208 | 2013-037A | CNSA | Jul 19, 2013 | 98 min, 98.1° | Active | ◉ |
| SHIYAN 4 (SY-4) Shiyan Weixing 4 | 37931 | 2011-068B | CASC | Nov 20, 2011 | 101 min, 98.7° | Active | ◉ |
| SHIYAN 3 (SY-3) Shiyan Weixing 3 | 33433 | 2008-056A | CASC | Nov 5, 2008 | 101 min, 98.6° | Active | ◉ |
| SHIYAN 1 (SY-1) Shiyan Weixing 1 | 28220 | 2004-012A | CASC | Apr 18, 2004 | 94 min, 97.9° | Active | ◉ |
Frequently asked questions
How many SY satellites are there?
The catalog lists 4 objects built on the SY bus. 4 are in orbit and 0 have reentered.
How many SY satellites are in orbit?
4 SY objects are currently in orbit, of which 4 carry an active status.
Who builds the SY bus?
The SY bus is most commonly built by DFH/HARB.
When did the first SY satellite launch?
The first cataloged SY satellite launched in 2004, and the most recent in 2013.