COSMOS 543
| Launched | 10 January 1973 |
| Flight ended | 24 January 1973 |
| Status | Decayed |
| Launch site | Tyuratam Missile and Space Center, Kazakhstan (Also known as Baikonur Cosmodrome) |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 6339 |
| COSPAR ID | 1973-002A |
| Observing |