Kosmos-2558

History

Kosmos-2558 is a Russian maneuverable military satellite launched in August 2022. Open-source analysts have described it as an inspection spacecraft because its orbit was closely aligned with the classified U.S. satellite USA 326 and because it demonstrated the ability to change its orbit.

The spacecraft's exact mission has not been publicly disclosed in detail. Some analysts associate Kosmos-2558 with Russian rendezvous, proximity-operation, and counterspace development, but the available sources do not establish its relationship to the Nivelir program as a confirmed fact.

Kosmos-2558 remained in low Earth orbit for several years. A September 2026 report stated that an object associated with the mission reentered Earth's atmosphere on September 12, although satellite tracker Jonathan McDowell reportedly questioned whether the object that reentered was the actual Kosmos-2558 spacecraft.

Launch and initial orbit

Kosmos-2558 was launched from the Plesetsk space launch site on 1 August 2022 aboard a Soyuz-2.1v launch vehicle. According to Russian Strategic Nuclear Forces, the launch occurred at 20:25 UTC and the spacecraft was delivered to orbit with a Volga upper stage. It received the international designation 2022-089A and NORAD catalog number 53323.

Shortly after deployment, Kosmos-2558 was reported in a roughly 435 by 452 km sun-synchronous orbit. Its orbital plane closely matched that of USA 326, a classified U.S. reconnaissance satellite. Different open-source analyses placed their separation at roughly 60 to 80 km during some approaches.

Orbital activity

Analysis published by The Space Review stated that Kosmos-2558 altered its orbit in 2022 in a way that continued to match the orbital plane of USA 326. The same analysis emphasized that the spacecraft was not necessarily in a continuously close proximity orbit and that its connection with earlier Russian inspector satellites was unclear.

The Space Review also reported that a secondary object designated Object C, catalog number 64627, separated from Kosmos-2558 on 26 June 2025. According to that analysis, Object C subsequently maneuvered and made a closest approach to USA 326 of about 58 km on 19 July 2025. These observations were interpreted by some analysts as potentially related to Russian inspection or counterspace experimentation, but this interpretation remains analytical rather than an officially confirmed mission description.

Design

Public technical information about Kosmos-2558 is limited. The spacecraft was designed for maneuvering in low Earth orbit, a capability necessary for changing its relative geometry with other satellites and for conducting rendezvous or inspection-type operations.

The Satcat catalog lists Lavochkin as the manufacturer and identifies the spacecraft bus as KARAT-200. Satcat gives a wet mass of approximately 547 kg and a dry mass of about 400 kg. It describes the object as cylindrical with two panels and gives an approximate characteristic size of 1.6 m. These catalog values are not accompanied in the supplied sources by an official Russian technical specification and should therefore be treated as open-source identification data.

Orbital maneuvering

Kosmos-2558's principal publicly observed technical characteristic was its ability to maneuver after reaching orbit. Changes in orbital altitude and plane matching allowed analysts to follow its changing relationship with USA 326. The available material does not provide propulsion type, propellant quantity, thrust, electrical power, sensor configuration, or confirmed inspection payload details.

Program status

Satcat lists Kosmos-2558 as decayed. A report published in September 2026 stated that an object associated with the mission fell back to Earth on September 12. However, the report also noted uncertainty over the identity of the reentering object, with Jonathan McDowell suggesting that it might not have been the actual satellite. The supplied material therefore supports the end of the cataloged orbital object but does not conclusively resolve what physically reentered.

The wider significance of Kosmos-2558 remains disputed. Some analysts place it within the lineage of Russian inspector or co-orbital counterspace spacecraft, while the available evidence does not establish a confirmed anti-satellite weapon role for Kosmos-2558 itself. Its observed behavior is consistent with rendezvous and proximity-operation testing, but the spacecraft's complete mission and payload remain classified or undisclosed.

Specifications (Kosmos-2558)

General characteristics

• Type: Maneuverable Russian military satellite commonly described in open-source analysis as an inspection satellite
• Manufacturer: Lavochkin, according to Satcat
• Spacecraft bus: KARAT-200, according to Satcat
• Wet mass: approximately 547 kg, according to Satcat
• Dry mass: approximately 400 kg, according to Satcat
• Approximate size: 1.6 m characteristic dimension, according to Satcat
• Configuration: cylindrical body with two panels, according to Satcat

Launch and identification

• Launch date: 1 August 2022
• Launch vehicle: Soyuz-2.1v
• Launch site: Plesetsk space launch site, Russia
• International designation: 2022-089A
• NORAD catalog number: 53323

Orbit

• Initial orbit: approximately 435 by 452 km
• Orbit type: low Earth, sun-synchronous orbit
• Observed activity: orbital maneuvering and plane matching with USA 326