A possible flyby anomaly for Juno at Jupiter

Abstract

In the last decades there have been an increasing interest in improving the accuracy of spacecraft navigation and trajectory data. In the course of this plan some anomalies have been found that cannot, in principle, be explained in the context of the most accurate orbital models including all known effects from classical dynamics and general relativity. Of particular interest for its puzzling nature, and the lack of any accepted explanation for the moment, is the flyby anomaly discovered in some spacecraft flybys of the Earth over the course of twenty years. This anomaly manifest itself as the impossibility of matching the pre and post-encounter Doppler tracking and ranging data within a single orbit but, on the contrary, a difference of a few mm$/$s in the asymptotic velocities is required to perform the fitting. Nevertheless, no dedicated missions have been carried out to elucidate the origin of this phenomenon with the objective either of revising our understanding of gravity or to improve the accuracy of spacecraft Doppler tracking by revealing a conventional origin. With the occasion of the Juno mission arrival at Jupiter and the close flybys of this planet, that are currently been performed, we have developed an orbital model suited to the time window close to the perijove. This model shows that an anomalous acceleration of a few mm$/$s${}^2$ is also present in this case. The chance for overlooked conventional or possible unconventional explanations is discussed.

28 pages, 9 figures (Submitted to Advances in Space Research)

References in corpus (9)

• Gravity Probe B: Final Results of a Space Experiment to Test General Relativity
• Support for the thermal origin of the Pioneer anomaly
• The Energy Transfer Process in Planetary Flybys
• The effect of general relativity on hyperbolic orbits and its application to the flyby anomaly
• Effect of TTC on Satellite Orbital Mechanics
• On the effect of ocean tides and tesseral harmonics on spacecraft flybys of the Earth
• Hyperbolic orbits of Earth flybys and effects of ungravity-inspired conservative potentials
• Kinematics effects of atmospheric friction in spacecraft flybys
• On a correlation among azimuthal velocities and the flyby anomaly sign

Cited by in corpus (1)

• Impact models of gravitational and electrostatic forces: Potential energies, atomic clocks, gravitational anomalies and redshift