The combination of the Doppler data from the first two Juno science orbits provides an improved estimate of the gravity field of Jupiter, crucial for interior modeling of giant planets. The low-degree spherical harmonic coefficients, especially J4 and J6, are determined with accuracies better than previously published by a factor of 5 or more. In addition, the independent estimates of the Jovian gravity field, obtained by the orbits separately, agree within uncertainties, pointing to a good stability of the solution. The degree 2 sectoral and tesseral coefficients, C2,1, S2,1, C2,2, and S2,2, were determined to be statistically zero as expected for a fluid planet in equilibrium.
Jupiter gravity field estimated from the first two Juno orbits / Folkner, W.M; Iess, L.; Anderson, J.D.; Asmar, S.W.; Buccino, D.R.; Durante, D.; Feldman, M.; Gomez Casajus, L.; Gregnanin, M.; Milani, A.; Parisi, M.; Park, R.S.; Serra, D.; Tommei, G.; Tortora, P.; Zannoni, M.; Bolton, S.J.; Connerney, J.E.P.; Levin, S.M.. - In: GEOPHYSICAL RESEARCH LETTERS. - ISSN 0094-8276. - STAMPA. - 44:(2017), pp. 4694-4700. [10.1002/2017GL073140]
Jupiter gravity field estimated from the first two Juno orbits
GOMEZ CASAJUS, LUIS ANTONIO;TORTORA, PAOLO;ZANNONI, MARCO;
2017
Abstract
The combination of the Doppler data from the first two Juno science orbits provides an improved estimate of the gravity field of Jupiter, crucial for interior modeling of giant planets. The low-degree spherical harmonic coefficients, especially J4 and J6, are determined with accuracies better than previously published by a factor of 5 or more. In addition, the independent estimates of the Jovian gravity field, obtained by the orbits separately, agree within uncertainties, pointing to a good stability of the solution. The degree 2 sectoral and tesseral coefficients, C2,1, S2,1, C2,2, and S2,2, were determined to be statistically zero as expected for a fluid planet in equilibrium.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
