the MON and NOO reduced their heliocentric distance of the ascending nodes as time goes to the past. It seems that it takes only two or three hundreds years until the ascending node reaches the nominal orbit of the parent comet. On the contrary, the semimajor axes of both the MON and NOO are generally constant over 5000yr, which might be due to low perturbations of giant planets and higher inclinations. Even with the beta parameter, the semimajor axes remain far away from the nominal or even cloned orbits of the parent comet. Meteoroids could be injected to these orbits directly after the ejection from the cometary core. The inclination of the MON is quite consistent with the current orbital inclination of the comet C/1917 F1 Mellish. The orbital evolution in inclination implies that MON were released recently, generally hundreds, or at most, 3000 years in the past. On the contrary, the NOO meteoroids have lower inclinations in the present day. The orbital evolution reveals that NOO meteoroids could have departed from the comet mostly 4000 years prior and almost all low inclined NOO could be explained by an orbital evolution within the last 5000 years – most of the 