{
  "abstract": "Astrometry is the oldest method used to search for extrasolar planets. This technique provides key information about a planetary system, like the true mass of planets and its three-dimensional orbital architecture. Nowadays, the space-based mission Gaia, on one hand, and ground-based interferometry at infrared and radio wavelengths, on the other hand, can achieve astrometric accuracies of tens of micro-arseconds. Thanks to this unprecedented level of accuracy, the number of astrometrically discovered exoplanets has started to grow. In this chapter, I review the basic principles for orbital characterization of unseen planetary companions using astrometric data. I also review the properties of the exoplanets discovered so far with astrometric methods and comment on the contributions that this technique can make to the exoplanet field.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.26664",
  "author_total": 1,
  "authors": [
    {
      "name": "Gisela N. Ortiz-Leon"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/35ak838vfwq55.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.26664",
  "fulltext_url": null,
  "id": "35ak838vfwq55",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.26664",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.EP"
    ],
    [
      "openalex",
      "3103|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W7214119339",
  "pdf_url": "https://arxiv.org/pdf/2609.26664",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/35ak838vfwq55.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2609.26664",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.26664"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.EP",
      "subfield": "planetary"
    }
  ],
  "title": "Characterization of Planetary Systems with Astrometry",
  "title_text": "Characterization of Planetary Systems with Astrometry",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/35ak838vfwq55",
  "venue": "arXiv",
  "versions": []
}