| Official name | TIANHUI 4B |
| Alternative name | Tianhui 4-02 |
| Cospar ID | 2021-134B |
| Norad ID | 50573 |
| Launch date | 2021-12-29 |
| Launch site | JSC |
| Launch vehicle | CZ-2D (2) |
| Country/Organization | China |
| Type application | Earth observation |
| Operator | PLA |
| RCS size | MEDIUM |
| Decay date | ON ORBIT |
| Period (min) | 93.49 |
| Inclination (deg) | 88.98 |
| Perigee (km) | 438 |
| Apogee (km) | 453 |
| Eccentricity | 0.0168350168350168 |
| Mean motion (revs. per day) | 15.4027168681142 |
| Semi-Major axis (km) | 6823.635 |
| Raan (deg) | 17.2701 |
| Arg of perigee (deg) | 144.5229 |
| Shape | Box + 2 Pan |
| Mass (kg) | 1000 |
| Height (m) | 1 |
| Width (m) | 1 |
| Depth (m) | 1 |
| Span (m^2) | 3 |
| Contractors | CAST DFH |
| Power | Solar cells, batteries |
| Satellite | COSPAR | Date | LS | Launch Vehicle | Remarks | |
|---|---|---|---|---|---|---|
| TIANHUI 4B | 2021-134B | 2021-12-29 | JSC | CZ-2D (2) | with Tianhui 4A | |
| TIANHUI 4A | 2021-134A | 2021-12-29 | JSC | CZ-2D (2) | with Tianhui 4B |
