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In 2007, the observed Earth flyby anomalies have been successfully simulatedusing an empirical formula (H. J. Busack, 2007). This simulation has led to theprediction of anomaly values, to be expected for the Rosetta flybys of Mars in2007, and following twice of Earth in 2007 and 2009. While the data for theMars flyby are yet under evaluation, the predictions of the formula for thelast two Earth flybys of Rosetta are fully confirmed now. This is remarkable,since an alternatively proposed formula (Anderson et al., 2007) failed topredict the correct values for the recent flybys. For the Mercury flybys of theMessenger spacecraft, this alternative formula predicts a null result. In themeantime, Doppler residuals of these flybys on 14.01.2008 and 06.10.2008 areavailabel. On both flybys, significant residuals were observed, using gravitydata derived by Mariner 10 on Mercury (D. E. Smith et al., 2009). According tothe authors, these residuals cannot be eliminated totally by adjustment of thesecond degree gravity coefficients and by assumption of irregular massconcentrations of acceptable value on Mercury. In this investigation, I adaptthe output of the simulation program to compare with the measured Dopplerresiduals of the Mercury flybys without changing the formerly derivedparameters for the Earth flybys. The simulation with these parameters leads toDoppler residuals of the Mercury flybys compatible with the measured curves.Additionally, the expected flyby anomalies are calculated. Since the gravityfield of Mercury is not explored yet with sufficient accuracy, this resultcannot be falsified or confirmed until the evaluation of the coming Mercuryorbits of Messenger will be finished. If the proposed empirical formula wouldbe confirmed then again, this would be a strong indication of an underlyingphysical reality.

Test for consistence of a flyby anomaly simulation with the observed Doppler residuals for the Messenger flybys of Mercury