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THE EFFECT OF A TRANS-PLUTONIAN PLANET ON HALLEY'S COMET
JOSEPH L. BRADY
Publications of the Astronomical Society of the Pacific
Vol. 84, No. 498 (April 1972), pp. 314-322
Published by: Astronomical Society of the Pacific
Stable URL: http://www.jstor.org/stable/40675223
Page Count: 9
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An orbit and mass for a hypothetical trans-Plutonian planet is determined which reduces the residuals in the time of perihelion passage of Halley's comet at the seven apparitions from 1910 to 1456 by 93%. The effect of this hypothetical planet on the major planets is briefly discussed, and it is shown that the residuals of two similar periodic comets, Olbers and Pons-Brooks, are also improved.
Publications of the Astronomical Society of the Pacific © 1972 The University of Chicago Press