Pioneer 10 Encounter with a Trans-Neptunian Object at 56 AU?

Details Pioneer 10 Encounter with a Trans-Neptunian Object at 56 AU? Pioneer 10 Encounter with a Trans-Neptunian Object at 56 AU?

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999dps....31.2604g&link_type=abstract

American Astronomical Society, DPS meeting #31, #26.04

Astronomy and Astrophysics

Astronomy

Scientific paper

Using coherent radio Doppler data generated by the Deep Space Network (DSN) at S band (wavelength ~ 13 cm), we have produced averages of radial accelerations acting on the Pioneer 10 spacecraft between 40 and 70 AU. The one-sigma accuracy of the reduced accelerations is 2.5 x 10(-10) m s(-2) . Here we develop the theory of weak gravitational interactions of a spacecraft with orbiting bodies, and search the data record for candidate flybys. We apply the theory to a candidate event at distance 56 AU, ecliptic longitude 73.9 Deg and latitude 3.1 Deg. Fitting these data provides constraints on the physical and orbital properties of the body allegedly encountered by Pioneer 10. Finally, we consider the dynamical origin of the body, and speculate about its possible ejection from the solar system due to a close encounter with a major planet.

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