FY-4 Satellite Bus
Data current as of 2026-07-20.
The FY-4 bus accounts for 21 cataloged objects, of which 19 are in orbit and 19 are active. Most are built by SISE. The largest operator on this bus is ZLZB. The first launched in 2016, the most recent in 2026.
19
In orbit
19
Active
21
Total launched
0
Reentered
FY-4 launched per year
Still in orbit Click a year to list its satellites.
Typical specifications
Most common values across cataloged FY-4 satellites.
| Manufacturer | SISE |
|---|---|
| Purpose | Early warning ? |
| Launch mass | 5000 kg |
| Dry mass | 2500 kg |
| Length | 5 m |
| Diameter | 2.5 m |
| Span | 30 m |
| Shape | Box + 2 Pan |
| Power | 2 deployable solar arrays, batteries |
| Propulsion | LAE |
| Design life | 5 years |
| Equipment | GIIRS, LMI, AGRI, SEMIP, DCS |
| Typical orbit | 1436 min period, 0° inclination |
Top operators
ZLZB 10 CASC 5 NSMC 3 People's Liberation Army Strategic Support Force (PLA SSF) 1 SAST 1
Top countries
CN 12 PRC 9
FY-4 satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| OBJECT A TJS 26A | 69674 | 2026-144A | ZLZB | Jun 23, 2026 | 1436 min, 6.9° | Inactive | ◉ |
| TJS-24 TJS 24 | 69235 | 2026-116A | ZLZB | May 26, 2026 | 1436 min, 0.1° | Inactive | ◉ |
| FENGYUNG-4C | 67246 | 2025-312A | NSMC | Dec 26, 2025 | 1436 min, 0.0° | Active | ◉ |
| YAOGAN 45 | 65563 | 2025-202A | ZLZB | Sep 9, 2025 | 271 min, 19.9° | Active | ◉ |
| CHINASAT 3B | 64062 | 2025-106A | ZLZB | May 20, 2025 | 1436 min, 0.0° | Active | ◉ |
| TJS-19 | 63924 | 2025-097A | SAST | May 12, 2025 | 1436 min, 3.2° | Active | ◉ |
| TJS-17 | 63524 | 2025-073A | ZLZB | Apr 10, 2025 | 1436 min, 1.1° | Active | ◉ |
| TJS-16 | 63397 | 2025-064A | ZLZB | Mar 29, 2025 | 1436 min, 1.2° | Active | ◉ |
| TJS-15 | 63157 | 2025-045A | ZLZB | Mar 9, 2025 | 1436 min, 0.3° | Active | ◉ |
| TJS-14 Tongxin Jishu Shiyan 14 | 62804 | 2025-017A | People's Liberation Army Strategic Support Force (PLA SSF) | Jan 23, 2025 | 1436 min, 0.7° | Active | ◉ |
| TJS-12 Tongxin Jishu Shiyan 12 | 62374 | 2024-246A | ZLZB | Dec 20, 2024 | 1436 min, 0.6° | Active | ◉ |
| TJS-13 Tongxin Jishu Shiyan 13 | 62188 | 2024-227A | CASC | Dec 3, 2024 | 718 min, 63.8° | Active | ◉ |
| ZHONGXING-4A Zhongxing 4A | 60606 | 2024-151A | ZLZB | Aug 22, 2024 | 1436 min, 1.2° | Active | ◉ |
| ZHONGXING-3A Zhongxing 3A | 60179 | 2024-122A | ZLZB | Jun 29, 2024 | 1436 min, 0.0° | Active | ◉ |
| TJS-10 Tongxin Jishu Shiyan 10 | 58204 | 2023-169A | ZLZB | Nov 3, 2023 | 1436 min, 2.6° | Active | ◉ |
| TJS-7 Tongxin Jishu Shiyan 7 | 49115 | 2021-077A | CASC | Aug 24, 2021 | 1436 min, 0.3° | Active | ◉ |
| FENGYUN 4B Feng Yun 4B | 48808 | 2021-047A | NSMC | Jun 2, 2021 | 1436 min, 0.2° | Active | ◉ |
| TJS-6 Tongxin Jishu Shiyan 6 | 47613 | 2021-010A | CASC | Feb 4, 2021 | 1436 min, 0.2° | Active | ◉ |
| TJS-5 Tongxin Jishu Shiyan 5 | 44978 | 2020-002A | CASC | Jan 7, 2020 | 1436 min, 0.1° | Active | ◉ |
| TJS-2 Tongxin Jishu Shiyan 2 | 41911 | 2017-001A | CASC | Jan 5, 2017 | 1436 min, 0.9° | Active | ◉ |
| FENGYUN 4A Feng Yun 4A | 41882 | 2016-077A | NSMC | Dec 10, 2016 | 1436 min, 2.4° | Active | ◉ |
Frequently asked questions
How many FY-4 satellites are there?
The catalog lists 21 objects built on the FY-4 bus. 19 are in orbit and 0 have reentered.
How many FY-4 satellites are in orbit?
19 FY-4 objects are currently in orbit, of which 19 carry an active status.
Who builds the FY-4 bus?
The FY-4 bus is most commonly built by SISE.
When did the first FY-4 satellite launch?
The first cataloged FY-4 satellite launched in 2016, and the most recent in 2026.