1968-021A
Zenit-4 No. 39 was launched in Mar 1968 and flew an 8 day mission at 65.6 degrees from Plesetsk.
| Kosmos-207 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1968 Mar 16 | 1230:00 | Launch by 11A57 | PL |
| 1234 | Blok-I burn | ||
| 1239 | Blok-I sep | 89.7 201 x 321 x 65.6 | |
| 1645 | 89.92 202 x 338 x 65.7 | ||
| 1968 Mar 24 | 0832 | 89.57 199 x 307 x 65.6 | |
| 1968 Mar 24 | 0735? | Deorbit | |
| 0755? | Landed after 7.79d | ||
1971-042A
The first of three Mars-71 probes, M-71S (3MS) No. 170 was launched on 1971 May 10. M-71S No. 170 was a light version of the M-71 series. It was intended to enter Mars orbit. The Blok-D first burn successfully placed the probe in parking orbit, but the engine failed to ignite for the second burn because of a software error. The failed probe was designated Kosmos-419 and it reentered after two days.
| Kosmos-419 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1971 May 10 | 1658:42 | Launch by Proton-K | KB |
| 1700 | Stage 2 burn | ||
| 1703 | Stage 3 burn | ||
| 1708 | Stage 3 sep | ||
| 1712? | Blok-D burn | ||
| 1714? | Blok-D cutoff | ||
| 1825? | Blok-D burn 2 failed to ignite | ||
| 1971 May 11 | 0851 | 87.52 141 x 162 x 51.5 | |
| 1971 May 11 | 1430 | 87.47 145 x 159 x 51.53 | |
| 1971 May 12 | 0936 | 87.25 137 x 139 x 51.5 | |
| 1971 May 12 | 2009? | Reentered | |
