The many shades of the 10th planet

Details The many shades of the 10th planet The many shades of the 10th planet

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979spfl...21..115l&link_type=abstract

Spaceflight, vol. 21, Mar. 1979, p. 115-123.

Physics

1

Orbital Elements, Planetology, Pluto (Planet), Solar Orbits, Solar System, Brightness, Comets, Gravitational Effects

Scientific paper

New data concerning Pluto has revived interest in the possibility of the existence of a tenth planet in our solar system. Ways for calculating the elements and ephemerides of the hypothetical planet are explored through an examination of the scant evidence. It is concluded that if the planet existed the following parameters would most likely be obtained: mean distance 62.5 AU; perihelion 30 AU; aphelion 92.5 AU; diameter 15,000-18,000 km; mass 5-6 earth masses; density 2.5-3.4 g/cu cm; surface temperature minus 240 C.

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