| Name of Satellite, Alternate Names | STSat-3 |
| Country of Operator/Owner | South Korea |
| Operator/Owner | Korea Aerospace Research Institute (KARI) |
| Users | Government |
| Purpose | Technology Development |
| Class of Orbit | LEO |
| Type of Orbit | |
| Longitude of GEO (degrees) | 0 |
| Perigee (km) | 593 |
| Apogee (km) | 626 |
| Eccentricity | 0.00236406619385343 |
| Inclination (degrees) | 97.81 |
| Period (minutes) | 96.88 |
| Launch Mass (kg.) | 150 |
| Dry Mass (kg.) | |
| Power (watts) | 275 |
| Date of Launch | 21-11-2013 |
| Expected Lifetime | 2 yrs. |
| Contractor | Korea Advanced Institute of Science and Technology (KAIST) |
| Country of Contractor | South Korea |
| Launch Site | Dombarovskiy Launch Facility |
| Launch Vehicle | Dnepr |
| COSPAR Number | 2013-066G |
| NORAD Number | 39422 |
| Comments | Science satellite carrying two sensors -- MIRIS and COMIS. |