{
  "id": "upsilon-tauri-128815-dba5219e61cdf5d6",
  "slug": "upsilon-tauri",
  "title": "Upsilon Tauri",
  "qid": "Q1107671",
  "lead": "Upsilon Tauri (υ Tauri) is a solitary, white-hued star in the zodiac constellation of Taurus, and is a member of the Hyades star cluster. It is faintly visible to the naked eye with an apparent visual magnitude of +4.3. Based upon an annual parallax shift of 21.21 mas seen from Earth, it is around 154 light years from the Sun.",
  "body": "Upsilon Tauri (υ Tauri) is a solitary, white-hued star in the zodiac constellation of Taurus, and is a member of the Hyades star cluster. It is faintly visible to the naked eye with an apparent visual magnitude of +4.3. Based upon an annual parallax shift of 21.21 mas seen from Earth, it is around 154 light years from the Sun. ==Properties== for Upsilon Tauri, plotted from TESS data This is an A-type main sequence star with a stellar classification of A8 Vn. It is classified as a Delta Scuti type variable star and its brightness varies from magnitude +4.28 to +4.31 with a period of 3.56 hours. At an estimated age of 827 million years, it is spinning rapidly with a rotation period of just 0.415 days. This is giving the star an oblate shape with an equatorial bulge that is 9% larger than the polar radius. Occasionally this star system shares the Bayer designation υ Tauri with 72 Tauri, which is separated from it by 0.29° in the sky. ==Naming== With φ, κ 1 , κ 2 and χ, it composed the Arabic were the Arabs' Al Kalbain, the Two Dogs. According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Kalbain were the title for five stars : φ as Alkalbain I, χ as Alkalbain II, κ 1 as Alkalbain III, κ 2 as Alkalbain IV and this star (υ) as Alkalbain V. ==References==",
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  "license": "CC BY-SA 4.0",
  "source_uri": "https://en.wikipedia.org/w/index.php?oldid=1370790720",
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  "created_at": 1792309041.691707,
  "updated_at": 1787446930.0,
  "claims": [],
  "contradictions": [],
  "confidence": 0.6,
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    "title": "Upsilon Tauri",
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    "container-title": "encyclopegia.org",
    "publisher": "Anticloud FZ LLE",
    "publisher-place": "Dubai, United Arab Emirates",
    "URL": "https://encyclopegia.org/a/upsilon-tauri",
    "issued": {
      "date-parts": [
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          2026,
          10,
          18
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    "license": "CC BY-SA 4.0",
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