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General >> Discussion >> Orcus = anti Pluto
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Message started by frankuitaalst on 03/29/09 at 10:29:33

Title: Orcus = anti Pluto
Post by frankuitaalst on 03/29/09 at 10:29:33

The biggest known Plutino , Orcus , is said to be the anti Pluto as it resides at the opposite site of Plutos orbit .
This is generally but partially true . Both objects have different orbital parameters . In general when Pluto is "west" Orcus will be "east" . áThis can easily be seen in a rotating frame with Neptune .
Due to the libration of both bodies however the angle Orcus makes from the sun as seen from Pluto can be more than 60░ .
I tested the Orcus orbit in this animation .
Orcus orbit is plotted as an observer would see it from Pluto keeping a fixed eye on the sun ( in the middle of the screen ) . Animation was run for 21000y .
The viewangle in this animation is about 136░ .
It seems Orcus may be occulted be the sun itwice in this time period in around 5000 and 11000y from now as its observed orbit sweeps over the sun.

Edit : I changed the animation to a viewangle of 150░ and added Jupiter , Saturn and Uranus

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