{
  "abstract": "Motivated by the peculiar features of the trans-Neptunian object (TNO) Máni and the discovery of ring systems around Centaurs and trans-Neptunian bodies, we investigate the stability of particles around a small irregular body hosting a deep equatorial crater. This study is the third contribution in a sequence devoted to the dynamics around non-spherically symmetric bodies. Using Máni as a reference model, whose crater depth exceeds 10 per cent of its radius, we map the system stability through complementary methods: Poincaré surfaces of section (PSS), survival maps, and the finite-time Lyapunov exponent (FTLE). In the nominal case, the $1\\!:\\!1$, $2\\!:\\!1$, $3\\!:\\!1$, and $4\\!:\\!1$ spin-orbit resonances (SORs) are consistently identified by all techniques. The prominent $3\\!:\\!1$ SOR exhibits a bifurcated structure at high eccentricities, matching structural transitions observed at lower Jacobi constant values in the PSSs. Increasing the rotation rate ($\\lambda$) and crater mass ratio (μ) enlarges resonance widths and promotes overlap, making the $2\\!:\\!1$ and $4\\!:\\!1$ SORs progressively dominant. Lower rotation rates allow stable trajectories to persist at higher eccentricities, whereas the $1\\!:\\!1$ SOR is highly sensitive to stronger perturbations and disappears in the most extreme cases. In contrast to mass-anomaly models, which can clear the region interior to the $2\\!:\\!1$ SOR, the crater configuration considered here preserves stable regions in this vicinity, suggesting alternative scenarios for the formation and maintenance of debris structures around irregular minor bodies.",
  "abstract_shown": true,
  "affiliations": [
    "Grupo de Dinâmica Orbital e Planetologia (GDOP), São Paulo State University-UNESP , Guaratinguetá, SP, CEP 12516-410 ,",
    "Observatório Nacional/MCTI , R. General José Cristino 77, CEP 20921-400, RJ ,"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "P V S Soares",
      "orcid": "0009-0009-5523-5759"
    },
    {
      "affs": [
        1
      ],
      "name": "G Madeira",
      "orcid": "0000-0001-5138-230X"
    },
    {
      "affs": [
        0
      ],
      "name": "S M Giuliatti Winter",
      "orcid": "0000-0002-3949-6045"
    },
    {
      "affs": [
        0
      ],
      "name": "T Ribeiro",
      "orcid": "0000-0003-0071-6247"
    },
    {
      "affs": [
        0
      ],
      "name": "O C Winter"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a9getx57h8sxe.bib",
  "cited_by": 0,
  "doi": "10.1093/mnras/stag1900",
  "fulltext_url": null,
  "id": "a9getx57h8sxe",
  "issns": [
    "0035-8711",
    "1365-2966"
  ],
  "landing_url": "https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1900/8876088",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3103|Astro and Planetary Science"
    ]
  ],
  "openalex": "W7220737048",
  "pdf_url": "https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stag1900/71668219/stag1900.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-07",
  "publisher": "Oxford University Press (OUP)",
  "ris": "https://research.draconitic.com/paper/a9getx57h8sxe.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:17Z",
      "native_id": "10.1093/mnras/stag1900",
      "source": "crossref",
      "url": "https://academic.oup.com/mnras/article/doi/10.1093/mnras/stag1900/8876088"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Astro and Planetary Science",
      "subfield": "planetary"
    }
  ],
  "title": "Dynamics around non-spherical symmetric bodies–III. The case of a spherical body with a crater",
  "title_text": "Dynamics around non-spherical symmetric bodies–III. The case of a spherical body with a crater",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:17Z",
  "url": "https://research.draconitic.com/paper/a9getx57h8sxe",
  "venue": "Monthly Notices of the Royal Astronomical Society",
  "versions": []
}