{
  "abstract": "The S301 star reaches a pericentre one tenth that of S2, opening a new regime for probing black-hole spin and departures from Schwarzschild. We develop a post-Newtonian secular Hamiltonian framework for bound geodesics in stationary, axisymmetric spacetimes and compute the maximum projected astrometric deviation over one orbit. At the expected GRAVITY+ precision, S301 can probe several nonrotating geometries and sizeable spin-induced deviations, while kilometre-baseline interferometry can probe much smaller departures, establishing S301 as a powerful test of the spacetime geometry of Sgr A*.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.07123",
  "author_total": 3,
  "authors": [
    {
      "name": "Rodrigo P Silva"
    },
    {
      "name": "Alexandre C.M Correia"
    },
    {
      "name": "Paulo J.V Garcia"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4fnq1yt57x6x9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.07123",
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  "id": "4fnq1yt57x6x9",
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  "landing_url": "https://hal.science/hal-05842231v1",
  "language": "en",
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      "astro-ph.GA"
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  "openalex": "W7220969579",
  "pdf_url": "https://arxiv.org/pdf/2610.07123",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4fnq1yt57x6x9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:02Z",
      "native_id": "hal-05842231",
      "source": "hal",
      "url": "https://hal.science/hal-05842231v1"
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    {
      "first_seen": "2026-10-30T12:27:22Z",
      "native_id": "2610.07123",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.07123"
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  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Probing departures from Schwarzschild geometry with the S301 star and kilometre-baseline interferometry",
  "title_text": "Probing departures from Schwarzschild geometry with the S301 star and kilometre-baseline interferometry",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:22Z",
  "url": "https://research.draconitic.com/paper/4fnq1yt57x6x9",
  "venue": "HAL",
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}