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There is an unceasing incoming flux of extraterrestrial materials reachingthe Earth's atmosphere. Some of these objects produce luminous columns whenthey ablate during the hypersonic encounter with air molecules. A few fireballsoccur each year bright enough to be detected from space. The source of theseevents is still a matter of debate, but it is generally accepted that they areof sporadic origin. We studied the NASA-JPL Center for NEOs Studies (CNEOS)fireball database to infer the dynamic origin of large bolides produced bymeter-sized projectiles that impacted our planet. These likelymeteorite-dropping events were recorded by the US Government satellite sensors.We estimated the false-positive rate and analyzed the time evolution ofmultiple orbit dissimilarity criteria concerning potential associations withnear-Earth objects and meteoroid streams. We found that at least 16% of thelarge bolides could be associated with meteoroid streams, about 4% are likelyassociated with near-Earth asteroids, and 4% may be linked to near-Earthcomets. This implies that a significant fraction of meter-sized impactorsproducing large bolides may have an asteroidal or cometary origin. In addition,we found at least three bolides having hyperbolic orbits with high tensilestrength values. Meter-sized meteoroids of interstellar origin could be morecommon than previously thought, representing about 1% of the flux of largebolides. The inferred bulk physical properties suggest that the interstellarmedium could bias these projectiles towards high strength rocks with theability to survive prolonged exposure to the harsh interstellar spaceconditions.

the astronomical journal

Orbital characterization of superbolides observed from space: dynamical  association with near-Earth objects, meteoroid streams and identification of  hyperbolic meteoroids