Because of their unique designs, the Pioneer 10 and 11 spacecraft have provided the cleanest Doppler, deep-space navigation data. Analysis of this data can be interpreted as showing an anomalous acceleration of these craft directed towards the Sun of $a_P \sim 8 \times 10^{-8} {\rm cm/s}^2$. The background of this discovery and the significance of the result are discussed. (Refer to PDF file for exact formula.)

Date of creation, presentation, or exhibit



"The Anomalous Trajectories of the Pioneer Spacecraft," Proceedings of the Second Meeting on CPT and Lorentz Symmetry. Held at Indiana University: Bloomington, Indiana: 15-18 August 2001. AND also archived at: arXiv:hep-ph/0110373 v1 29 Oct 2001 M.M.N. acknowledges support by the U.S. DOE. This work of J.D.A., E.L.L, and S.G.T. was performed under contract with the National Aeronautics and Space Administration. P.A.L. was supported by a grant from NASA through the Ultraviolet, Visible, and Gravitational Astrophysics Program.Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works in February 2014.

Document Type

Conference Proceeding

Department, Program, or Center

School of Physics and Astronomy (COS)


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