{
  "abstract": "We report the direct imaging discovery of a third exoplanet in the β Pictoris ( β Pic) system. We detect β Pictoris d ( β Pic d) in noncoronagraphic observations obtained with the Very Large Telescope (VLT) Enhanced Resolution Imager and Spectrograph (ERIS), as well as multi-epoch archival datasets from the JWST Near Infrared Camera (NIRCam) and VLT/SPHERE. Astrometric measurements over an 11 yr baseline demonstrate that it is consistent with a gravitationally bound source with orbital motion. Joint multi-planet orbit fits of all three planets in the system yield a semimajor axis of 26 . 0 − 6.1 + 2.2 au and inclination 89 . 0 − 0.6 + 0.7 deg for planet d. β Pic d has a larger orbital semimajor axis than the other known planets in the system, but is coplanar with the inner two planets, and its orbit is consistent with sculpting the inner edge of the debris disk. β Pic d has a contrast of Δ L ′ = 12.11 ± 0.15 mag, with colors and luminosity that closely match those of 51 Eri b, another exoplanet in the β Pic moving group. Its VLT/ERIS and JWST/NIRCam colors are distinct from those of free-floating planetary-mass objects of a similar age and temperature. Its red F410M − F444W color indicates strong CO 2 absorption in its atmosphere and suggests significant enhancement in metals compared to free-floating objects. From the ATMO hot-start evolutionary models, we estimate an effective temperature of 60 0 − 60 + 45 K and mass of 2.4 ± 0.6 M Jup , which also closely matches similar estimates for 51 Eri b. β Pic d is among the lowest-mass exoplanets imaged from the ground. This discovery highlights the deep sensitivity achievable with ground-based imaging in the mid-infrared and the discovery potential of future high-contrast observations with the Extremely Large Telescope.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.23801",
  "author_total": 97,
  "authors": [
    {
      "name": "Ben Sutlieff"
    },
    {
      "name": "Markus Bonse"
    },
    {
      "name": "Valentin Christiaens"
    },
    {
      "name": "Clémence Fontanive"
    },
    {
      "name": "Elisabeth Matthews"
    },
    {
      "name": "Luke Parker"
    },
    {
      "name": "Tim Pearce"
    },
    {
      "name": "Jayne Birkby"
    },
    {
      "name": "Beth Biller"
    },
    {
      "name": "Trent Dupuy"
    },
    {
      "name": "Emily Garvin"
    },
    {
      "name": "Leyla Iskandarli"
    },
    {
      "name": "Jens Kammerer"
    },
    {
      "name": "Yifan Zhou"
    },
    {
      "name": "Robert de Rosa"
    },
    {
      "name": "Aarynn Carter"
    },
    {
      "name": "Sasha Hinkley"
    },
    {
      "name": "Matthew Kenworthy"
    },
    {
      "name": "William Balmer"
    },
    {
      "name": "Iain Hammond"
    },
    {
      "name": "James Mang"
    },
    {
      "name": "Caroline Morley"
    },
    {
      "name": "Mark Neeser"
    },
    {
      "name": "Olivier Absil"
    },
    {
      "name": "Anthony Boccaletti"
    },
    {
      "name": "Mariangela Bonavita"
    },
    {
      "name": "Brendan Bowler"
    },
    {
      "name": "Xueqing Chen"
    },
    {
      "name": "Felix Dannert"
    },
    {
      "name": "Julien Girard"
    },
    {
      "name": "Markus Kasper"
    },
    {
      "name": "Anne-Marie Lagrange"
    },
    {
      "name": "Pengyu Liu"
    },
    {
      "name": "Gilles Orban de Xivry"
    },
    {
      "name": "Michael Poon"
    },
    {
      "name": "Sascha Quanz"
    },
    {
      "name": "Benoît Serra"
    },
    {
      "name": "Johanna Vos"
    },
    {
      "name": "Kevin Wagner"
    },
    {
      "name": "Jason Wang"
    },
    {
      "name": "Bernhard Schölkopf"
    },
    {
      "name": "Guido Agapito"
    },
    {
      "name": "Alex Agudo Berbel"
    },
    {
      "name": "Dániel Apai"
    },
    {
      "name": "Andrea Baruffolo"
    },
    {
      "name": "Martin Black"
    },
    {
      "name": "Marco Bonaglia"
    },
    {
      "name": "Runa Briguglio"
    },
    {
      "name": "Yixian Cao"
    },
    {
      "name": "Luca Carbonaro"
    },
    {
      "name": "Lee Chapman"
    },
    {
      "name": "Giovanni Cresci"
    },
    {
      "name": "Yigit Dallilar"
    },
    {
      "name": "Richard Davies"
    },
    {
      "name": "Matthias Deysenroth"
    },
    {
      "name": "Ivan Di Antonio"
    },
    {
      "name": "Amico Di Cianno"
    },
    {
      "name": "Gianluca Di Rico"
    },
    {
      "name": "David Doelman"
    },
    {
      "name": "Mauro Dolci"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/c4f5k0pabajwm.bib",
  "cited_by": 3,
  "doi": "10.3847/2041-8213/ae80a0",
  "fulltext_url": null,
  "id": "c4f5k0pabajwm",
  "issns": [
    "2041-8205",
    "2041-8213"
  ],
  "landing_url": "https://hal.science/hal-05845908v1",
  "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": [
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.astr"
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      "openalex",
      "3103|Stellar, planetary, and galactic studies"
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  "pdf_url": "https://iopscience.iop.org/article/10.3847/2041-8213/ae80a0/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-15",
  "publisher": "Bristol : IOP Publishing",
  "ris": "https://research.draconitic.com/paper/c4f5k0pabajwm.ris",
  "sources": [
    {
      "first_seen": "2026-10-31T12:20:56Z",
      "native_id": "hal-05845908",
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      "url": "https://hal.science/hal-05845908v1"
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  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Stellar, planetary, and galactic studies",
      "subfield": "stellar"
    }
  ],
  "title": "Direct Imaging Discovery of Giant Exoplanet β Pictoris d: A Decade-long Game of Hide-and-seek",
  "title_text": "Direct Imaging Discovery of Giant Exoplanet β Pictoris d: A Decade-long Game of Hide-and-seek",
  "type": "peer-reviewed",
  "updated_at": "2026-11-01T12:20:46Z",
  "url": "https://research.draconitic.com/paper/c4f5k0pabajwm",
  "venue": "The Astrophysical Journal Letters",
  "versions": []
}