On May 28, 2004 Russia successfully launched a Tsiklon-2 rocket from the launch pad No. 20 of the launch complex No. 90 of the Baykonur launch site. The launch was performed by the Space Forces crews at 10:00 MSK (09:00 DMV, 06:00 UTC). The satellite delivered into orbit was designated Cosmos-2405 (see note on designations).

Cosmos-2405 is reported (Kommersant, May 29, 2004) to be a new US-PU satellite of the Legenda (EORSAT) naval reconnaissance and targeting system. It became the only satellite of this type on orbit. Previous satellite of this type, Cosmos-2383 (27053/2001-057A), launched in December 2001 stopped operations in May 2003 and reentered atmosphere in March 2004.

The satellite was given an international designation 2004-020A and the NORAD number 28350. According to NORAD data, inclination of the initial orbit of Cosmos-2405 is 65.0 degrees, orbital period is about 93 minutes. Apogee of the orbit is about 427 km, perigee - 412 km.