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.
Den 15. oktober 2014 meddelte NASA, at 2014 MU69 var blevet valgt som et muligt mål for New Horizons og den blev uofficielt betegnet "Potential Target 1", eller PT1.