trans-Neptunian object

noun

Any natural object (usually a minor planet (asteroid) or a hypothetical planet) in the Solar System with all or most of its orbit outside the orbit of Neptune.

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Meanings

nountrans-Neptunian object (plural trans-Neptunian objects, abbreviation TNO)

plural trans-Neptunian objects · abbreviation TNO · alternative transneptunian object

  1. astronomyAny natural object (usually a minor planet (asteroid) or a hypothetical planet) in the Solar System with all or most of its orbit outside the orbit of Neptune.

Translations

German transneptunische Objekt
  • transneptunische ObjektTranslations
Polish obiekt transneptunowy
  • obiekt transneptunowyTranslations
Romanian obiect transneptunian
  • obiect transneptunianTranslations
Turkish Neptün ötesi cisim
  • Neptün ötesi cisimTranslations
Cite this entry
APA

trans-Neptunian object. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/trans-Neptunian%20object

MLA

“trans-Neptunian object.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/trans-Neptunian%20object. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “trans-Neptunian object,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/trans-Neptunian%20object.

Source: trans-Neptunian object on Wiktionary, CC BY-SA 4.0.