1972-072A
The first US-K prototype, which carried experimental infrared sensors, was launched in Sep 1972. It operated until December of that year.
| Kosmos-520 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 1972 Sep 19 | 1919:03? | Launch by 8K78M | PL |
| 1923 | Blok-I burn | ||
| 1928 | Blok-I sep | 92.92 187 x 649 x 62.9 (RAE) | |
| 2020? | Blok-2BL burn | ||
| 2020? | BOZ sep | 92.78 214 x 607 x 62.82 (72C) | |
| 2023? | Blok-2BL sep | ||
| 1972 Sep 19 | 710.00 651 x 39318 x 62.9 | ||
| 1972 Oct 15 | 2050 | 706.72 664 x 39143 x 62.9 | |
| 1972 Oct? | Orbit raise | ||
| 1972 Dec 12 | End of operations | ||
| 1972 Dec 26 | 0553 | 715.05 742 x 39477 x 62.9 | |
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