{
  "abstract": "Residing in the center of the Milky Way, Sgr A* is the closest massive black hole. Its vicinity has allowed measuring individual stellar orbits around it with periods as short as 12 years. The stars act as test particles and probe the gravitational potential around the 4.3 × 10^6 M_sun black hole. These observations have determined the central mass to sub-percent precision, and the mildly relativistic motions of stars have given access to seeing the dominant relativistic corrections, the gravitational redshift, the transverse Doppler effect and the prograde precession imposed by the Schwarzschild metric nature of the potential. These effects are of order (v/c)^2 (for velocity v and speed of light c). The Kerr metric occur- ring for a rotating black hole leads to corrections of order (v/c)^3. Here, we report the discovery of a faint main sequence star (mK = 19.3), S301, the orbit of which has a period of 8.7 years and small enough a pericenter distance, such that the star’s peak velocity reaches 25000 km/s or 8% of c. Within the measurement capabilities of current near-infrared interferometry and future spectroscopy on an extremely large telescope, S301’s motion is directly sensitive to the spin of Sgr A*. The high eccentricity of S301 suggests that it is the captured component of a binary that was torn apart via the Hills mechanism, sending the other component away as a hyper-velocity star.",
  "abstract_shown": true,
  "affiliations": [
    "LIRA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université Université de Paris, Meudon, France",
    "European Southern Observatory, Garching, Germany",
    "CENTRA-Centro de Astrofísica e Gravitaçao, IST, Universidade de Lisboa, Lisbon, Portugal",
    "Faculdade de Engenharia, Universidade do Porto, Porto, Portugal",
    "Max Planck Institute for Extraterrestrial Physics, Garching, Germany",
    "Universitat Politècnica de València, Valencia, Spain",
    "Université Grenoble Alpes, CNRS, IPAG, Grenoble, France",
    "Max Planck Institute for Astronomy, Heidelberg, Germany",
    "University Observatory, Faculty of Physics, Ludwig-Maximilians-Universität, Munich, Germany",
    "Max Planck Institute for Astrophysics, Garching, Germany",
    "Millennium Nucleus on Transversal Research and Technology to Explore Supermassive Black Holes (TITANS), Viña del Mar, Chile",
    "Universidad Adolfo Ibáñez, Viña del Mar, Chile",
    "Institute of Astronomy, KU Leuven, Leuven, Belgium",
    "Department of Physics, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany",
    "School of Physics, University College Dublin, Dublin, Ireland",
    "Astronomy Department and Oden Institute, University of Texas at Austin, Austin, TX, USA",
    "Departments of Physics and Astronomy, Le Conte Hall, University of California, Berkeley, Berkeley, CA, USA",
    "Max Planck Institute for Extraterrestrial Physics, Garching, Germany. ste@mpe.mpg.de",
    "European Southern Observatory, Santiago, Chile",
    "School of Physics and Astronomy, University of Southampton, Southampton, UK",
    "French-Chilean Laboratory for Astronomy, IRL 3386, CNRS and Universidad de Chile, Santiago, Chile",
    "1st Institute of Physics, University of Cologne, Cologne, Germany",
    "Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, Laboratoire Lagrange, Nice, France",
    "Department of Physics, TUM School of Natural Sciences, Technical University of Munich, Garching, Germany. fmang@mpe.mpg.de",
    "Max Planck Institute for Extraterrestrial Physics, Garching, Germany. fmang@mpe.mpg.de",
    "LIRA, Observatoire de Paris, Université PSL, CNRS, Sorbonne Université Université de Paris, Meudon, France. juan.osorno@obspm.fr"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 93,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "K. Abd El Dayem",
      "orcid": "0009-0003-2632-9365"
    },
    {
      "affs": [
        1
      ],
      "name": "R. Abuter"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "N. Aimar",
      "orcid": "0000-0001-5710-452X"
    },
    {
      "affs": [
        4,
        5
      ],
      "name": "Pau Amaro‐Seoane",
      "orcid": "0000-0003-3993-3249"
    },
    {
      "affs": [
        1,
        0
      ],
      "name": "Anthony Berdeu",
      "orcid": "0000-0003-4863-6211"
    },
    {
      "affs": [
        6
      ],
      "name": "Jean-Philippe Berger",
      "orcid": "0000-0001-5025-0428"
    },
    {
      "affs": [
        4
      ],
      "name": "Guillaume G. Bourdarot",
      "orcid": "0000-0002-6777-6386"
    },
    {
      "affs": [
        7
      ],
      "name": "W. Brandner",
      "orcid": "0000-0003-1939-6351"
    },
    {
      "affs": [
        4,
        8
      ],
      "name": "Andreas M. Burkert",
      "orcid": "0000-0001-6879-9822"
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        9
      ],
      "name": "Diego Calderón",
      "orcid": "0000-0002-9019-9951"
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    {
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        2,
        3
      ],
      "name": "Carlos M Correia",
      "orcid": "0000-0002-6996-0734"
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        11
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      "name": "Jorge Cuadra",
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        4
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      "name": "R. Davies",
      "orcid": "0000-0003-4949-7217"
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      "name": "Denis Defrère",
      "orcid": "0000-0003-3499-2506"
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        0
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      "name": "L. Delit"
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        4,
        6
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      "name": "A. Drescher"
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        13,
        4
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      "name": "Frank Eisenhauer"
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        1
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      "name": "Luis Esteras Otal"
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        4
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      "name": "Maximilian Fabricius",
      "orcid": "0000-0002-7025-6058"
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        4
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      "name": "H. Feuchtgruber",
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      "name": "S. Flesch"
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      "name": "N. M. Förster Schreiber",
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        0
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      "name": "A. Foschi",
      "orcid": "0000-0002-4636-637X"
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      "name": "Quentin Fournier",
      "orcid": "0009-0000-5692-8412"
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        3
      ],
      "name": "Paulo J V Garcia",
      "orcid": "0000-0002-1678-3535"
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    {
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        14
      ],
      "name": "R. García López",
      "orcid": "0000-0002-2144-0991"
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    {
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        15
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      "name": "Aleksey Generozov",
      "orcid": "0000-0001-9261-0989"
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    {
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        16,
        4
      ],
      "name": "R. Genzel",
      "orcid": "0000-0002-2767-9653"
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    {
      "affs": [
        17
      ],
      "name": "S. Gillessen",
      "orcid": "0000-0002-5708-0481"
    },
    {
      "affs": [
        1
      ],
      "name": "Frédéric Gonté",
      "orcid": "0009-0005-3700-3584"
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    {
      "affs": [
        18
      ],
      "name": "X. Haubois",
      "orcid": "0000-0001-7878-7278"
    },
    {
      "affs": [
        19
      ],
      "name": "S. F. Hönig"
    },
    {
      "affs": [
        6
      ],
      "name": "M. Houllé",
      "orcid": "0000-0001-5633-2010"
    },
    {
      "affs": [
        4
      ],
      "name": "S. Joharle"
    },
    {
      "affs": [
        18
      ],
      "name": "A. Kaufer",
      "orcid": "0000-0002-5270-3686"
    },
    {
      "affs": [
        1
      ],
      "name": "J Kammerer",
      "orcid": "0000-0003-2769-0438"
    },
    {
      "affs": [
        20,
        0
      ],
      "name": "P. Kervella",
      "orcid": "0000-0003-0626-1749"
    },
    {
      "affs": [
        1
      ],
      "name": "Johann Kolb",
      "orcid": "0009-0009-8819-4236"
    },
    {
      "affs": [
        7
      ],
      "name": "Laura Kreidberg",
      "orcid": "0000-0003-0514-1147"
    },
    {
      "affs": [
        21
      ],
      "name": "Lucas Labadie",
      "orcid": "0000-0001-5342-5713"
    },
    {
      "affs": [
        0
      ],
      "name": "S. Lacour",
      "orcid": "0000-0002-6948-0263"
    },
    {
      "affs": [
        22
      ],
      "name": "Olivier Lai",
      "orcid": "0000-0001-5656-7346"
    },
    {
      "affs": [
        12
      ],
      "name": "Romain Laugier",
      "orcid": "0000-0002-2215-9413"
    },
    {
      "affs": [
        6
      ],
      "name": "J.-B. Le Bouquin",
      "orcid": "0000-0002-0493-4674"
    },
    {
      "affs": [
        18,
        19
      ],
      "name": "J. Leftley",
      "orcid": "0000-0001-6009-1803"
    },
    {
      "affs": [
        4
      ],
      "name": "R. Li",
      "orcid": "0000-0001-8496-4162"
    },
    {
      "affs": [
        22
      ],
      "name": "Bruno Lopez",
      "orcid": "0000-0002-8632-4211"
    },
    {
      "affs": [
        4
      ],
      "name": "Dieter Lutz",
      "orcid": "0000-0003-0291-9582"
    },
    {
      "affs": [
        23,
        24
      ],
      "name": "F. Mang",
      "orcid": "0000-0001-8637-4051"
    },
    {
      "affs": [
        1
      ],
      "name": "A. Mérand",
      "orcid": "0000-0003-2125-0183"
    },
    {
      "affs": [
        22
      ],
      "name": "Florentin A. Millour",
      "orcid": "0000-0002-9765-7783"
    },
    {
      "affs": [
        0
      ],
      "name": "M. Montargès",
      "orcid": "0000-0002-7540-999X"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "N. Morujão"
    },
    {
      "affs": [
        22
      ],
      "name": "H. Nowacki",
      "orcid": "0000-0002-5762-0249"
    },
    {
      "affs": [
        0
      ],
      "name": "Mathias Nowak"
    },
    {
      "affs": [
        1
      ],
      "name": "S. Oberti",
      "orcid": "0000-0002-5878-2186"
    },
    {
      "affs": [
        25
      ],
      "name": "J. Osorno"
    },
    {
      "affs": [
        4
      ],
      "name": "T. Ott"
    },
    {
      "affs": [
        0
      ],
      "name": "T. Paumard",
      "orcid": "0000-0003-0655-0452"
    },
    {
      "affs": [
        18
      ],
      "name": "C. Paladini",
      "orcid": "0000-0003-4974-7239"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2cr79zka3pq16.bib",
  "cited_by": 20,
  "doi": "10.1038/s41586-026-10894-w",
  "fulltext_url": null,
  "id": "2cr79zka3pq16",
  "issns": [
    "0028-0836",
    "1476-4687"
  ],
  "landing_url": "https://doi.org/10.1038/s41586-026-10894-w",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3103|Astrophysical Phenomena and Observations"
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  "pdf_url": "https://www.nature.com/articles/s41586-026-10894-w.pdf",
  "pmcid": "PMC13558046",
  "pmid": "42618794",
  "published": "2026-08-19",
  "publisher": "Nature Portfolio",
  "ris": "https://research.draconitic.com/paper/2cr79zka3pq16.ris",
  "sources": [
    {
      "first_seen": "2026-11-07T13:20:45Z",
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      "url": "https://doi.org/10.1038/s41586-026-10894-w"
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  "subjects": [
    {
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      "origin": "openalex:3103|Astrophysical Phenomena and Observations",
      "subfield": "general"
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  ],
  "title": "Discovery of a star sensitive to the spin of Sagittarius A*",
  "title_text": "Discovery of a star sensitive to the spin of Sagittarius A*",
  "type": "peer-reviewed",
  "updated_at": "2026-11-09T13:21:03Z",
  "url": "https://research.draconitic.com/paper/2cr79zka3pq16",
  "venue": "Nature",
  "versions": []
}