Its existence as a potential target of the New Horizons probe was announced by NASA in October 2014 and it was unofficially designated as "Potential Target 1", or PT1.
2014年10月にNASAはニュー・ホライズンズの探査対象候補としてその存在を発表し、非公式に「"Potential Target 1"」もしくは「PT1」と呼んだ。