quasi-planet

I am not so sure that in order to make a comet a quasi-planet, and as such to deck it out in the attributes of other planets, it is sufficient for Sarsi or his teacher to regard it as one and so name it. If heir opinions and their voices have the power of calling into existence the things they name, then I beg them to do me the favor of naming a lot of the old hardware I have about my house, "gold." But, names aside, what attribute induced them to regard the comet as a quasi-planet for a time?