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Non-gravitational acceleration in the trajectory of 1I/2017 U1 ('Oumuamua)
Marco Micheli, Davide Farnocchia, Karen J. Meech et al., 2018. Nature.
Reports, at 30-sigma significance, a non-gravitational acceleration in the astrometry from 14 October 2017 to 2 January 2018, including Hubble positions. All data fit once a radial acceleration scaling as the inverse square or inverse of heliocentric distance is added. Rules out radiation pressure for an ordinary body, drag, solar-wind forces on a magnetised object, a binary, and a photocentre offset, and finds comet-like outgassing the physically viable explanation if the body has comet-like thermal properties. Nature 559, 223-226.
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The central anomaly, the measurement every explanation must reproduce.
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Cite it
Micheli, M., Farnocchia, D., Meech, K. J., Buie, M. W., Hainaut, O. R., Prialnik, D., Schörghofer, N., Weaver, H. A., Chodas, P. W., Kleyna, J. T., Weryk, R., Wainscoat, R. J., Ebeling, H., Keane, J. V., Chambers, K. C., Koschny, D., & Petropoulos, A. E. (2018). Non-gravitational acceleration in the trajectory of 1I/2017 U1 ('Oumuamua). Nature. https://doi.org/10.1038/s41586-018-0254-4@article{micheli2018nongravitational,
author = {Micheli, Marco and Farnocchia, Davide and Meech, Karen J. and Buie, Marc W. and Hainaut, Olivier R. and Prialnik, Dina and Schörghofer, Norbert and Weaver, Harold A. and Chodas, Paul W. and Kleyna, Jan T. and Weryk, Robert and Wainscoat, Richard J. and Ebeling, Harald and Keane, Jacqueline V. and Chambers, Kenneth C. and Koschny, Detlef and Petropoulos, Anastassios E.},
title = {Non-gravitational acceleration in the trajectory of 1I/2017 U1 ('Oumuamua)},
journal = {Nature},
year = {2018},
doi = {10.1038/s41586-018-0254-4},
url = {https://doi.org/10.1038/s41586-018-0254-4}
}TY - JOUR
TI - Non-gravitational acceleration in the trajectory of 1I/2017 U1 ('Oumuamua)
AU - Micheli, Marco
AU - Farnocchia, Davide
AU - Meech, Karen J.
AU - Buie, Marc W.
AU - Hainaut, Olivier R.
AU - Prialnik, Dina
AU - Schörghofer, Norbert
AU - Weaver, Harold A.
AU - Chodas, Paul W.
AU - Kleyna, Jan T.
AU - Weryk, Robert
AU - Wainscoat, Richard J.
AU - Ebeling, Harald
AU - Keane, Jacqueline V.
AU - Chambers, Kenneth C.
AU - Koschny, Detlef
AU - Petropoulos, Anastassios E.
PY - 2018
JO - Nature
DO - 10.1038/s41586-018-0254-4
UR - https://doi.org/10.1038/s41586-018-0254-4
ER - Micheli, Marco et al.. “Non-gravitational acceleration in the trajectory of 1I/2017 U1 ('Oumuamua).” Nature (2018). https://doi.org/10.1038/s41586-018-0254-4.