Anatoly Zak reports on the maneuvers of Cosmos-2504 whose signals were detected by a Dutch amateur radio enthusiast Cees Bassa.

Cosmos-2504 was launched on March 31, 2015, at 16:47:56 Moscow Time from Site 133 in Plesetsk. Just hours later it was noted it was transmitting signals similar to previous maneuverable satellites — Cosmos-2491 (RS-46) and Cosmos-2499 (RS-47).

Read the article at http://russianspaceweb.com/Cosmos-2504.html

COSMOS-2499 Callsign RS-47 https://amsat-uk.org/2014/11/30/cosmos-2499-callsign-rs-47/

COSMOS-2491 is RS-46 https://amsat-uk.org/2014/12/02/cosmos-2491-rs-46/