Nevertheless, hypotheses concerning the existence of a tenth planet continued, with occasionally discoveries of other classes of bodies being hailed in the press as the long searched for tenth planet. Two recent examples of this were the discovery by Kowal in 1977 of 2060 Chiron (Kowal 1989), and 1992 QB
1 discovered in 1992 August by Jewitt & Luu (1992). Chiron is a Saturn-crosser with a perihelion distance of 8.46 au and an aphelion distance of 18.96 au, and was the first member discovered of a new class of objects within the Solar system which has been given the collective name of ‘Centaurs’. 1992 QB
1 was more than 40 au from the Sun and was to be the first discovery of a member of the Edgeworth-Kuiper Belt of objects.
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