A solution of Jupiter’s gravitational field from Juno data with the orbit14 software

Serra, Daniele; Lari, Giacomo; Tommei, Giacomo; Durante, Daniele; Casajus, Luis Gomez; Notaro, Virginia; Zannoni, Marco; Iess, L.; Tortora, Paolo; Bolton, S. J.

doi:10.1093/mnras/stz2657

Cited by 18 publications

(18 citation statements)

References 45 publications

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“…Given this large range, using updated physical parameters (see e.g. Folkner et al 2017;Iess et al 2018;Serra et al 2019) would only slightly shift the value of α within our exploration interval.…”

Section: Precession Constantmentioning

confidence: 99%

The future large obliquity of Jupiter

Saillenfest

Lari

Courtot

2020

A&A

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Aims. We aim to determine whether Jupiter’s obliquity is bound to remain exceptionally small in the Solar System, or if it could grow in the future and reach values comparable to those of the other giant planets. Methods. The spin-axis of Jupiter is subject to the gravitational torques from its regular satellites and from the Sun. These torques evolve over time due to the long-term variations of its orbit and to the migration of its satellites. With numerical simulations, we explore the future evolution of Jupiter’s spin axis for different values of its moment of inertia and for different migration rates of its satellites. Analytical formulas show the location and properties of all relevant resonances. Results. Because of the migration of the Galilean satellites, Jupiter’s obliquity is currently increasing, as it adiabatically follows the drift of a secular spin-orbit resonance with the nodal precession mode of Uranus. Using the current estimates of the migration rate of the satellites, the obliquity of Jupiter can reach values ranging from 6° to 37° after 5 Gyr from now, according to the precise value of its polar moment of inertia. A faster migration for the satellites would produce a larger increase in obliquity, as long as the drift remains adiabatic. Conclusions. Despite its peculiarly small current value, the obliquity of Jupiter is no different from other obliquities in the Solar System: It is equally sensitive to secular spin-orbit resonances and it will probably reach comparable values in the future.

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Section: Precession Constantmentioning

confidence: 99%

The future large obliquity of Jupiter

Saillenfest

Lari

Courtot

2020

A&A

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“…The research version of the BSW can readily deal with KBRR data as an heritage of previous GRACE (e.g., Meyer et al., 2016, 03) and GRAIL (e.g., Arnold et al., 2015) activities at the Astronomical Institute of the University of Bern (AIUB). We extended the framework of BSW processing to include nongravitational force models, reference frames and an accurate modeling of Doppler observables (following the guidelines of Moyer, 2003) to comply with standards of OD software currently used in planetary OD and geodesy (e.g, Evans et al., 2018; GRGS, 2018; Pavlis et al., 2013; Serra et al., 2019).…”

Section: Grail Orbit Determination In the Bernese (Gnss) Softwarementioning

confidence: 99%

Assessing Reduced‐Dynamic Parametrizations for GRAIL Orbit Determination and the Recovery of Independent Lunar Gravity Field Solutions

Bertone

Arnold

Girardin

et al. 2021

Earth and Space Science

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“…Through the data of the first two perijoves, PJ01 and PJ02, it was possible to have a first great improvement on the knowledge of the gravitational coefficients of Jupiter (Folkner et al, 2017). However, only when the gravity perijoves PJ03 and PJ06 were performed, the north-south asymmetry of the gravitational field was revealed (Iess et al, 2018;Serra et al, 2019b). The significant improvement of the even zonal harmonics and the detection of the odd zonal harmonics provided strong constraints on the interior of Jupiter.…”

Section: Current State Of the Missionmentioning

confidence: 99%

“…2018). A detailed analysis of the first two gravity-dedicated perijoves (PJs) of Juno performed with Orbit14 was presented in Serra et al (2019b). The CMG of Pisa is carrying out the data processing along with the other research groups involved in the experiment, updating the gravitational parameters as Juno mission continues to orbit Jupiter (Durante et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Orbit determination methods for interplanetary missions: development and use of the Orbit14 software

Lari,

Schettino,

Serra

et al. 2021

Preprint

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In the last years, a new generation of interplanetary space missions have been designed for the exploration of the solar system. At the same time, radio-science instrumentation has reached an unprecedented level of accuracy, leading to a significant improvement of our knowledge of celestial bodies. Along with this hardware upgrade, software products for interplanetary missions have been greatly refined. In this context, we introduce Orbit14, a precise orbit determination software developed at the University of Pisa for processing the radio-science data of the BepiColombo and Juno missions. Along the years, many tools have been implemented into the software and Orbit14 capitalized the experience coming from simulations and treatment of real data. In this paper, we present a review of orbit determination methods developed at the University of Pisa for radio-science experiments of interplanetary missions. We describe the basic theory of the process of parameters estimation and refined methods necessary to have full control on experiments involving spacecraft orbiting millions of kilometers far from the Earth. Our aim is to give both an extensive description of the treatment of radio-science experiments and step-to-step instructions for those who are approaching the field of orbit determination in the context of space missions. We show also the work conducted on the Juno and BepiColombo missions by means of the Or-bit14 software. In particular, we summarize the recent results obtained with the gravity experiment of Juno and the simulations performed so far for the gravimetry-rotation and relativity experiments of BepiColombo.

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A solution of Jupiter’s gravitational field from Juno data with the orbit14 software

Cited by 18 publications

References 45 publications

The future large obliquity of Jupiter

The future large obliquity of Jupiter

Assessing Reduced‐Dynamic Parametrizations for GRAIL Orbit Determination and the Recovery of Independent Lunar Gravity Field Solutions

Orbit determination methods for interplanetary missions: development and use of the Orbit14 software

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