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It is also a circumbinary planet, orbiting around a binary system composed of the pulsar PSR B1620-26 A and the white dwarf WD B1620-26. Methuselah同時也是一顆circumbinary行星，它圍繞著一個雙星系統鏇轉，這個雙星系統由脈沖星PSR B1620-26 A和白矮星WD B1620-26組成。