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Title:
Planet X - The current status
Authors:
Seidelmann, P. K.; Harrington, R. S.
Affiliation:
AA(U.S. Naval Observatory, Washington, DC), AB(U.S. Naval Observatory, Washington, DC)
Publication:
(BMFWF, Oesterreichische Forschungsgemeinschaft, Steiermaerkischer Wissenschafts- und Forschungslandesfonds, et al., Alexander von Humboldt Colloquium on Celestial Mechanics: Long Term Evolution of Planetary Systems, Ramsau, Austria, Mar. 14-18, 1988) Celestial Mechanics (ISSN 0008-8714), vol. 43, no. 1-4, 1987-1988, p. 55-68.
Publication Date:
00/1988
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
CERES ASTEROID, INFRARED ASTRONOMY SATELLITE, PLANET EPHEMERIDES, PLUTO (PLANET), COMPANION STARS, NEMESIS (STAR), PREDICTIONS, SOLAR SYSTEM
Bibliographic Code:
1988CeMec..43...55S

Abstract

Theoretical models of solar-system dynamics which predict the existence of a 10th planet (planet X) are surveyed and compared with recent observations. The history of the discoveries of Neptune and Pluto on the basis of discrepancies in the orbit of Uranus is recalled in detail, and the persistence of such discrepancies in 9-planet computations is considered. Particular attention is given to ongoing efforts to compute the current position of planet X, and to ground-based and space-based (IRAS and Pioneer) searches. Diagrams and graphs are provided.

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