Launch data:
| Designation | 07427 / 74070A |
| Launch date | 30 Aug 1974 |
| Launch site | Va, SLC-5 |
| Launch vehicle | Scout-D1 (#89) |
| Mission | Scientific: UV and X-ray astronomy |
| Earth orbit: | |
| Perigee/Apogee | 268/2174 km |
| Inclination | 98° |
| Period | 99.1 min |
| Mass at launch | 130 kg |
