COSMOS 1673
| Launched | 7 August 1985 |
| Flight ended | 18 September 1985 |
| Status | Decayed |
| Launch site | Tyuratam Missile and Space Center, Kazakhstan (Also known as Baikonur Cosmodrome) |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 15942 |
| COSPAR ID | 1985-068A |
| Observing |
Launched alongside
SL-4 R/B RADUGA 16 SL-12 R/B(1) SL-12 PLAT COSMOS 1673 DEB SL-12 R/B SL-12 R/B SL-12 R/B(2)