Investigation of the Origins of Comets as Revealed through Infrared High-resolution Spectroscopy I. Molecular Abundances

We report and analyze updated molecular abundances in 20 comets obtained by employing modern data reduction procedures models. Using box scatter plots, we examine how the different species are distributed among comet population, while means of pie charts, investigate relative proportions these each comet. compare results with orbital parameters selected to identify trends related their dynamical history. With analyses, tentatively at least three chemical classes based mainly on CO, CH3OH, CH4, C2H6, HCN, NH3. The combination is then compared recent models planetary system formation. This approach may help investigating origins evolution material cometary nuclei. Among other aspects, underline need increase our sample size, especially for hypervolatiles (i.e., CH4 CO) Jupiter family comets.