Search for planet X

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Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991plas.rept...53h&link_type=abstract

In NASA, Washington, Reports of Planetary Astronomy, 1991 p 53 (SEE N92-12792 03-89)

Astronomy and Astrophysics

Astronomy

Perturbation, Sky Surveys (Astronomy), Solar Orbits, Space Observations (From Earth), Neptune (Planet), Uranus (Planet)

Scientific paper

The observation of the region of the sky in which it is believed Planet X should now be, based on perturbations observed in the motions of Uranus and Neptune, was determined, and there was no reason to update that determination. A limited area of that region was photographed, and that will be continued. A given area is photographed with the twin 20 cm astrograph in New Zealand on two successive nights near the time that area is in opposition, and these plates are blinked in Washington to identify anything that has moved. The predicted region is in the south, which requires observations from a southern station, and it is in opposition in the April to June period, which means observations have not yet started for the year. Blinking will be done as soon as the plates are received in Washington.

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