{
  "abstract": "Transiting sub-Neptunes on orbits longer than a month are rare around bright stars. We report a candidate with a 36.34-day period around TIC 402710280, a $V = 10.0$ K dwarf at 66.8 pc that the Transiting Exoplanet Survey Satellite (TESS) has observed only in full-frame images. Four transits from 2021 to 2026, reduced by three independent pipelines, have consistent depths (mean $2092 \\pm 47$ ppm) and a duration of $5.27 \\pm 0.05$ h. Two are 36.36 days apart. The light curves exclude every shorter period consistent with both down to one day, and the duration disfavors still shorter ones, leaving $P = 36.33986 \\pm 0.00051$ d. The candidate's radius is $3.75 \\pm 0.22\\,R_\\oplus$ and its equilibrium temperature $498 \\pm 21$ K. Difference-image centroids place the signal $1.5'' \\pm 1.3''$ from the target, and eclipse models of the only nearby Gaia source, $3.5''$ away, fit worse than a planet by $Δχ^2 \\geq 142$ for every main-sequence pair. TRICERATOPS gives a false-positive probability of $0.003 \\pm 0.004$; without high-resolution imaging, the object remains a candidate. The transit times scatter about a linear ephemeris by 21.8 min (rms), and an independent reduction reproduces the largest departure. Four transits cannot separate timing systematics from transit-timing variations. A second signal, of $407 \\pm 26$ ppm at 3.78 days, may come from the target, an unresolved companion, or the background star. We predict a transit in TESS Sector 114 on 2027 February 19.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.26056",
  "author_total": 1,
  "authors": [
    {
      "name": "Rishit Vora"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1hfjemp0vpt60.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.26056",
  "fulltext_url": null,
  "id": "1hfjemp0vpt60",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.26056",
  "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": "W7223040700",
  "pdf_url": "https://arxiv.org/pdf/2610.26056",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1hfjemp0vpt60.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:34Z",
      "native_id": "2610.26056",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.26056"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.EP",
      "subfield": "planetary"
    }
  ],
  "title": "A 36.34-day Sub-Neptune Candidate Transiting the Nearby K Dwarf TIC 402710280",
  "title_text": "A 36.34-day Sub-Neptune Candidate Transiting the Nearby K Dwarf TIC 402710280",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:34Z",
  "url": "https://research.draconitic.com/paper/1hfjemp0vpt60",
  "venue": "arXiv",
  "versions": []
}