| Designation | 13829 / 83011A |
| Launch date | 20 Feb 1983 |
| Country of origin | Japan |
| Mission | Scientific: X-ray astronomy |
| Perigee/Apogee | 431/438 km |
| Inclination | 31.5° |
| Period | 93.3 min |
| Launch vehicle | Mu 3S1 |
| Launch site | Tanegashima |
| Mass at launch | 220 kg |
| Decay | 17 Dec 1988 |