  Mini-EUSO is a small orbital telescope with a field of view of
$44^{\circ}\times 44^{\circ}$, observing the night-time Earth mostly in 320-420
nm band. Its time resolution spanning from microseconds (triggered) to
milliseconds (untriggered) and more than $300\times 300$ km of the ground
covered, already allowed it to register thousands of meteors. Such detections
make the telescope a suitable tool in the search for hypothetical heavy compact
objects, which would leave trails of light in the atmosphere due to their high
density and speed. The most prominent example are the nuclearites --
hypothetical lumps of strange quark matter that could be stabler and denser
than the nuclear matter. In this paper, we show potential limits on the flux of
nuclearites after collecting 42 hours of observations data.
