The first D-5B satellite was lost in the 1973 May 21 launch failure. Its planned orbit wsa 300 x 1290 km x 20 deg. The spacecraft was to test a microaccelerometer for air density studies. The second stage separation rockets failed to produce enough thrust to separate from stage 3.
| D-5B | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1973 May 21 | Launch by Diamant B | CSG ELD | |
| Stage 2 burn | |||
| Stage 2 failed to sep? | |||
| Failed to orbit | |||