KH-7 21 was launched on 1965 Aug 3 by Atlas Agena D from Vandenberg. It carried a subsatellite launched to a 500 km orbit.
| KH-7 21 | |||
| Date | Time | Event | Orbit | 
|---|---|---|---|
| 1965 Aug 3 | 1912? | Launch by Atlas Agena D | V | 
| T+2:18? BECO | |||
| T+4:37? SECO | |||
| T+4:54? VECO | |||
| T+4:59? Atlas sep | |||
| T+5:51? Agena MES | |||
| 1921? | T+9:50? Agena MECO | ||
| OCV sep | 149 x 307 x 107.5 | ||
| 1965 Aug 3 | 1930? | Subsatellite launched | |
| 1965 Aug 6? | SRV recovered? | ||
| 1965 Aug 7 | 2150? | Reentered after 4.11d | |