Issue 143

What’s Up with Cosmos 2576

17 Apr 2026: Cosmos 2576 (59773), a suspected Nivelir co-orbital weapon system, raised its SMA nearly 30km from 28 Mar - 11 Apr. Russian space operators conducted a series of maneuvers to raise Cosmos 2576's SMA from 481km to 509km. Until now, Cosmos 2576's typical operating SMA was 480-490km. The satellite has maintained its new SMA from 11-16 April.

17 Apr 2026: Cosmos 2576 (59773), a suspected Nivelir co-orbital weapon system, raised its SMA nearly 30km from 28 Mar – 11 Apr. Russian space operators conducted a series of maneuvers to raise Cosmos 2576’s SMA from 481km to 509km. Until now, Cosmos 2576’s typical operating SMA was 480-490km. The satellite has maintained its new SMA from 11-16 April. Russia launched Cosmos 2576 into a nearly co-planar orbit with a high-value US reconnaissance satellite, USA 314, on 16 May 2024. Graphic below shows the last known orbits for both Cosmos 2576 and USA 314. Please note USA 314 orbit information is nearly 8 months old.

28 Mar – 11 April: Cosmos 2576 Increased SMA 27.7km (left) Inconsistent with Pattern of Life (right) (celestrak.org)

Cosmos 2576 Maintaining Near Co-Planar Orbit with USA 314 Inclination Difference = 0.7° RAAN Difference = 0.4° NOTE: USA 314 Orbit Data last Update 16 Aug 2025 (saberastro.com)