@Article{, title={Re-Distribution of the Regions of 100 Comets Using a Statistical Method}, author={Rasha S. Najm and Salman Z. Khalaf and Khaleel I. Abood}, journal={Iraqi Journal of Science المجلة العراقية للعلوم}, volume={64}, number={1}, pages={469-479}, year={2023}, abstract={In this study, the comets have distributions regarding their heliocentric distanceswhere they appear in two regions, Kuiper belt (short period) and Oort cloud (longperiod). Details here give new information about the entire regions of these comets;the research shows that 54% of comets are nearby asteroid belt, but only 11% are inKuiper belts and 35 % are from Oort cloud. The research focuses on comets with anucleus's radius larger than 1 km. The comets with a nuclear radius of 1-10 km havehigh percentage 51%.From the results, the maximum comets' radius is found in comet29P/Schwassmann -Wachmann as roughly 87 km, and also in comet C/2018 N2(ASASSN) which has radius 88 km. All comets, that have been distributedconcerning heliocentric, depend on statistical results to divide new comets' regionsversus their radiuses. The results reveal new details of comets' distances from thesun. The distances of 100 comets are shown in Figure (2).The results show that there is a third comets' region: region (A) found between Marsand Saturn and between Oort cloud and Kuiper belt.There is one comet like(C/2019 L3 (ATLAS)) that is farther than Alpha Centauristar. Therefore, the comet is restricted by a couple of gravity systems.

} }