| Name of Satellite, Alternate Names | Cubesat XI-IV (Oscar 57, CO-57) |
| Country of Operator/Owner | Japan |
| Operator/Owner | Department of Astronautics, University of Tokyo |
| Users | Civil |
| Purpose | Technology Development |
| Class of Orbit | LEO |
| Type of Orbit | Sun-Synchronous |
| Longitude of GEO (degrees) | 0 |
| Perigee (km) | 815 |
| Apogee (km) | 830 |
| Eccentricity | 0.00104275286757039 |
| Inclination (degrees) | 98.7 |
| Period (minutes) | 101.3 |
| Launch Mass (kg.) | |
| Dry Mass (kg.) | 1 |
| Power (watts) | |
| Date of Launch | 30-06-2003 |
| Expected Lifetime | |
| Contractor | Department of Astronautics, University of Tokyo |
| Country of Contractor | Japan |
| Launch Site | Plesetsk Cosmodrome |
| Launch Vehicle | Dnepr |
| COSPAR Number | 2003-031J |
| NORAD Number | 27848 |
| Comments | On-orbit verification of the super small satellite (nano-satellite) bus system using commercial-off-the-shell components. |