Vostok-2A (11A510) was a two-stage Soviet orbital launch-vehicle variant in the R-7 lineage. Two vehicles flew successfully from Baikonur in 1965 and 1966, launching Kosmos 102 and Kosmos 125 as tests related to the US-A ocean-reconnaissance satellite program. The expendable launcher used an R-7 core with four strap-on boosters.