先鋒P-1(W)號（Pioneer P-1）是一個未能執行的先鋒系列計劃。其本來計劃是進行環繞月球的任務，然而由於火箭在地面測試時發生了爆炸而終止。此時探測器本身並沒有裝載，完好的探測器後來成為了先鋒3號。[1]
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