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COSMOS 991
Launch Details
Launched | 27 February 1978 |
Flight ended | – |
Status | Unknown |
Launch site | Plesetsk Missile and Space Complex, Russia |
Owner | Commonwealth of Independent States (former USSR) |
NORAD ID | 10692 |
COSPAR ID | 1978-022A |
Observing |
Current orbital elements
Inclination | 82.987° |
Eccentricity | 0.00379 |
RA ascending node | 2.915 hr |
Argument perigee | 90.169° |
Mean anomaly | 331.817° |
Orbital period | 104.616 min |
Epoch of osculation | 16 Jul 2024, 12:46 |
Derived Quantities
Min Altitude | 955.7 km |
Mean Altitude | 983.6 km |
Peak Altitude | 1011.5 km |
Orbital History
Drag the graphs below left or right to change the time range, or use your scroll wheel to zoom in or out.
Launched alongside
SL-8 R/B