Photo: Joel Kowsky · Public domain (US government)
Mission
Government/Top Secret · LEO
The Russian Pion-NKS (14F139) satellites are the naval component of the next generation ELINT satellite system Liana. As a replacement for both the passive ELINT US-PM and the active radar US-A, they carry both ELINT sensors as well as an active radar.
What it put in orbit
| Object | Type | Orbit | Globe |
|---|---|---|---|
| COSMOS 2550 2021-056A | Payload | 459 × 470 km · 67.1° | Globe |
| SL-4 R/B 2021-056B | Rocket body | re-entered 2021-07-26 |
COSPAR ID 2021-056 (data from GCAT, J. McDowell, CC BY 4.0). Orbits from the CelesTrak satellite catalogue (perigee × apogee, inclination).