CBAA007 Official 13th February 2007 British Astronomical Society first day cover with the Sky At Night stamps and official BAA postmark. Personally autographed by Cosmonaut Anatoli Artsebarsky. He became a cosmonaut in 1985. Artsebarsky has spent almost 5 months in space on a single spaceflight. In 1991, he flew aboard Soyuz TM-12 and docked with the Mir Space Station. Artsebarsky and Sergei Krikalev stayed aboard Mir while the rest of the crew flew back to Earth after eight days. Artsebarsky took six spacewalks during the Mir EO-9 mission. He spent over 33 hours walking in space.