Launch data:
| Designation | 07471 / 74077A |
| Launch date | 15 Oct 1974 |
| Launch site | plat-forme San Matino dans la baie de Formose, au large des côtes du Kenya |
| Launch vehicle | Scout-B1 (#90) |
| Mission | Scientific:X-ray astronomy |
| Equatoriale Earth orbit: | |
| Perigee/Apogee | 504/549 km |
| Inclination | 2.9° |
| Period | 94.9 min |
