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Extending the graph backwards

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Although I had seen this graph before, I have been curious about Eris' orbit in the past and known from a source I forget that it was closer to the sun than Pluto in the past.

During its circa 1700 perihelion, there is no likelihood that Eris would have been closer to the Sun than Pluto, but during its previous perihelion in circa 1142, Eris must have been closer to the Sun than Pluto, which reached its own aphelion in 1122 and would have been thus no closer to the Sun than it was in 1888, which would mean Pluto must have been further than 37 astronomical units from the Sun. My calculations show Eris must have been closer to the Sun than Pluto for much of the first half of the twelfth century AD, but where could I get confirmation of this.

luokehao, 5 October 2009 4:21 UTC

Could you upload your data so that an SVG chart can be created? The current chart is a bit on the busy side. Cypher3c (talk) 00:25, 19 March 2010 (UTC)[reply]