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A recent report by astronomers about Unidentified Aerial Phenomena (UAP) inUkraine (arXiv:2208.11215) suggests dark phantom objects of size 3-12 meters,moving at speeds of up to 15 km/s at a distance of up to 10-12 km with nooptical emission. I show that the friction of such objects with the surroundingair would have generated a bright optical fireball. Reducing their inferreddistance by a factor of ten is fully consistent with the size and speed ofartillery shells.

"Down to Earth" Limits on Unidentified Aerial Phenomena in Ukraine (Comment on arXiv:2208.11215)