Washington, Feb 3: With a spacewalk lasting eight hours and 13 minutes, two cosmouts have broken the previous record for longest Russian spacewalk of eight hours and seven minutes. To upgrade a high gain anten system, Expedition 54 Commander Alexander Misurkin and Flight Engineer Anton Shkaplerov of the Russian space agency Roscosmos began the spacewalk from the Intertiol Space Station (ISS) at 10.34 am EST on Friday (9.04 pm Friday India time) and completed it at 6.47 pm EST (5.17 am Saturday India time).