月球4B号（Луна-4B）也称为月球E-3 2号或月球1960 B[2]，是苏联的月球探测器，它由东方号运载火箭-L于1960年4月16日发射。发射后4个助推器出现不规则燃料喷放现象，之后便迅速脱离，引爆火箭主体。
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