The Mass Budget Necessary to Explain `Oumuamua as a Nitrogen Iceberg

Recently, a nitrogen iceberg was proposed as a possible origin for the first interstellar object, 1I/2017 U1, also known as Oumuamua. Here, we show that the mass budget in exo-Pluto planets necessary to explain the detection of Oumuamua as a nitrogen iceberg chipped off from a planetary surface requires a mass of heavy elements exceeding the total quantity locked in stars with 95% confidence, making the scenario untenable because only a small fraction of the mass in stars ends in exo-Plutos.