Spacecraft information: COSMOS 1638
| Launched | 20 March 1985 |
| Flight ended | – |
| Status | Unknown |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 15620 |
| COSPAR ID | 1985-023D |
| Observing |
Current orbital elements
| Inclination | 74.056° |
| Eccentricity | 0.00148 |
| RA ascending node | 18.213 hr |
| Argument perigee | 71.251° |
| Mean anomaly | 49.983° |
| Orbital period | 115.273 min |
| Epoch of osculation | 20 Dec 2025, 11:27 |
Derived Quantities
| Min Altitude | 1463.3 km |
| Mean Altitude | 1474.9 km |
| Peak Altitude | 1486.5 km |
Launched alongside
COSMOS 1635 COSMOS 1636 COSMOS 1637 COSMOS 1639 COSMOS 1640 COSMOS 1641 COSMOS 1642 SL-8 R/BOrbital History
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