This article contains information regarding a rocket or spacecraft that अभिव्यक्ति त्रुटि: अज्ञात विराम चिन्ह चरित्र "२"।.
Details may change as the countdown and ascent progress. Launch details: a Soyuz-FG will launch Soyuz TMA-21, a mission to the International Space Station for Roskosmos. Launch occurred from LC-1/5 at the Baikonur Cosmodrome. The crew consists of Expedition 27/Expedition 28 crewmembers Andrei Borisenko, Aleksandr Samokutyayev and Ronald Garan..
UTC. See 2011 in spaceflight and the Spaceflight Portal for further details.
Launch was scheduled for 4 अप्रिल 2011 at 22:18