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Beyond Jupiter, The World of Distant Minor Planets: (134340) Pluto - The “Downgraded” Planet
JOA 2019, Vol. 9, No. 2, Page 18 Author(s): André KnöfelAbstract: Pluto looks back on a changing fate: For 76 years he was considered the ninth planet in the solar system - but in this function he was an exception:very small and on a very inclined orbit that did not fit quite well with the other eight planets. Over time, other Trans- Neptunian objects were discovered,which have similar orbits as Pluto and are referred to as Plutinos. In 1998, Brian Marsden suggested that Pluto be given a second status:in addition to planetary status, as an asteroid with the particular number 10000. This proposal was rejected.