Asteroid families: properties, recent advances, and future opportunities

Novaković, Bojan; Vokrouhlický, David; Spoto, F.; Nesvorný, David

doi:10.1007/s10569-022-10091-7

Cited by 23 publications

(12 citation statements)

References 210 publications

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“…This secular perturbation produces a drift in the semi-major axis of the objects, changing the orbit of small asteroids over millions of years. It is now considered to be responsible for their migration from the main belt to the near-Earth region, and it represents the key to understanding the evolution of asteroid families (Bottke et al 2001, Spoto et al 2015, Novakovic et al 2022.…”

Section: Yarkovsky Effect Detectionmentioning

confidence: 99%

GaiaData Release 3

Tanga¹,

T.²,

Mignard³

et al. 2023

A&A

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Context. The third data release by the Gaia mission of the European Space Agency (DR3) is the first release to provide the community with a large sample of observations for more than 150 thousand Solar System objects, including asteroids and natural planetary satellites. The release contains astrometry (over 23 million epochs) and photometry, along with average reflectance spectra of 60518 asteroids and osculating elements. Aims. We present an overview of the procedures that have been implemented over several years of development and tests to process Solar System data at the level of accuracy that Gaia can reach. We illustrate the data properties and potential with some practical examples. Methods. In order to allow the users of Gaia DR3 to best exploit the data, we explain the assumptions and approaches followed in the implementation of the data processing pipeline for Solar System processing, and their effects in terms of data filtering, optimisation, and performances. We then test the data quality by analysing post-fit residuals to adjusted orbits, the capacity of detecting subtle dynamical effects (wobbling due to satellites or shape and Yarkovsky acceleration), and to reproduce known properties of asteroid photometry (phase curves and rotational light curves). Results. The DR3 astrometric accuracy is a clear improvement over the data published in DR2, which concerned a very limited sample of asteroids. The performance of the data reduction is met, and is illustrated by the capacity of detecting milliarcsecond-level wobbling of the asteroid photocentre that is due to satellite or shape effects and contributes to Yarkovsky effect measurements. Conclusions. The third data release can in terms of data completeness and accuracy be considered the first full-scale realisation of the Solar System survey by Gaia.

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Section: Yarkovsky Effect Detectionmentioning

confidence: 99%

GaiaData Release 3

Tanga¹,

T.²,

Mignard³

et al. 2023

A&A

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“…Agarwal et al (2020) favour a scenario of formation and evolution where the 288P binary system formed by rotational splitting following YORP spin-up, and where the activation happened independently of the splitting. Altogether, these findings raised a question about a possible interplay between the binarity, rotational destabilization and sublimation in MBCs (see discussion in Novaković et al 2022).…”

Section: Summary Discussion and Conclusionmentioning

confidence: 99%

“…248370 belongs to the family at a nominal cut-off distance of 55 m s −1 . The result suggests that 248370 is a member of the Themis family, which is about 3.3 Gyr old (Novaković et al 2022).…”

Section: Association To Asteroid Familiesmentioning

confidence: 96%

“…To further assess its stability, we retrieve the proper orbital elements and frequencies (Knežević & Milani 2000), and Lyapunov time of asteroid 248370 from the Asteroid Families Portal (Novaković et al 2022, see also Appendix A section in Vokrouhlický et al (2021)). These data are shown in Table 4.…”

Section: Long-term Dynamical Stabilitymentioning

confidence: 99%

“…The 11:5J resonance crosses the Themis family, to which 248370 likely also belongs (see Section 3.2 and (Novaković et al 2022)). In this respect, Hsieh et al (2020) found that many former Themis family members that stayed inside the main belt escaped from the family via the 11:5J resonance.…”

Section: Long-term Dynamical Stabilitymentioning

confidence: 99%

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Photometric and dynamic characterization of active asteroid (248370) 2005QN173

Novaković

Pavela

Hsieh

et al. 2022

Monthly Notices of the Royal Astronomical Society

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We present the physical and dynamical properties of the recently discovered active asteroid (248370) 2005QN173 (aka 433P). From our observations, we derived two possible rotation period solutions of 2.7 ± 0.1 and 4.1 ± 0.1 hours. The corresponding light curve amplitudes computed after correcting for the effect of coma are 0.28 and 0.58 mag, respectively. Both period solutions are shorter than the critical rotation limit computed for a strengthless triaxial ellipsoid, suggesting that rotation mass shedding should at least partly be responsible for the observed activity. We confirm that the activity level is fading further, but at a very modest rate of only 0.006 mag/day, still also compatible with sublimation-driven activity. We found that 248370 likely belongs to the Themis asteroid family, making it a fourth main-belt comet associated with this group. Orbital characteristics of 248370 are also consistent with its origin in the young 288P cluster of asteroids. The 288P cluster is associated with its namesake main-belt comet, providing an exciting possibility for a comparative analysis of intriguing main-belt comets 248370 and 288P.

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Old perturbative methods for a new problem in Celestial Mechanics: the space debris dynamics

Celletti

Vartolomei

2023

Boll Unione Mat Ital

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Perturbative methods have been developed and widely used in the XVIII and XIX century to study the behavior of N-body problems in Celestial Mechanics. Such methods apply to nearly-integrable Hamiltonian systems and they have the remarkable property to be constructive. A well-known application of perturbative techniques is represented by the construction of the so-called proper elements, which are quasi-invariants of the dynamics, obtained by removing the perturbing function to higher orders. They have been used to identify families of asteroids; more recently, they have been used in the context of space debris, which is the main core of this work. We describe the dynamics of space debris, considering a model including the Earth’s gravitational attraction, the influence of Sun and Moon, and the Solar radiation pressure. We construct a Lie series normalization procedure and we compute the proper elements associated to the orbital elements. To provide a concrete example, we analyze three different break-up events with nearby initial orbital elements. We use the information coming from proper elements to successfully group the fragments; the clusterization is supported by statistical data analysis and by machine learning methods. These results show that perturbative methods still play an important role in the study of the dynamics of space objects.

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Asteroid families: properties, recent advances, and future opportunities

Cited by 23 publications

References 210 publications

GaiaData Release 3

GaiaData Release 3

Photometric and dynamic characterization of active asteroid (248370) 2005QN173

Old perturbative methods for a new problem in Celestial Mechanics: the space debris dynamics

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