• A trans-Neptunian object (TNO), also written transneptunian object, is any minor planet in the Solar System that orbits the Sun at a greater average distance...
    41 KB (3,992 words) - 03:42, 23 April 2025
  • Thumbnail for Extreme trans-Neptunian object
    An extreme trans-Neptunian object (ETNO) is a trans-Neptunian object orbiting the Sun well beyond Neptune (30 AU) in the outermost region of the Solar...
    30 KB (2,325 words) - 19:12, 5 April 2025
  • Thumbnail for List of trans-Neptunian objects
    This is a list of trans-Neptunian objects (TNOs), which are minor planets in the Solar System that orbit the Sun at a greater distance on average than...
    287 KB (1,114 words) - 20:21, 5 May 2025
  • trans-Neptunian object is a trans-Neptunian object (TNO) in mean-motion orbital resonance with Neptune. The orbital periods of the resonant objects are...
    32 KB (3,229 words) - 20:16, 5 May 2025
  • Thumbnail for Sedna (dwarf planet)
    a surface chemical makeup somewhat similar to those of other trans-Neptunian objects. Sedna has no detectable atmosphere, as its temperature is far...
    100 KB (9,724 words) - 19:43, 7 May 2025
  • Thumbnail for Planets beyond Neptune
    bimodal distribution of the nodal distances of the extreme trans-Neptunian objects: avoiding a trans-Plutonian planet or just plain bias?". Monthly Notices...
    79 KB (9,629 words) - 20:16, 6 May 2025
  • Thumbnail for Solar System
    Sedna (76.2–937 AU) was the first extreme trans-Neptunian object to be discovered. It is a large, reddish object, and takes ~11,400 years to complete one...
    224 KB (21,984 words) - 04:00, 16 May 2025
  • Thumbnail for List of unnumbered trans-Neptunian objects
    This is a list of unnumbered trans-Neptunian objects (TNOs) first observed since 1993 and grouped by the year of principal provisional designation. The...
    56 KB (598 words) - 22:49, 13 February 2025
  • Thumbnail for Kuiper belt
    Hills cloud or Oort cloud objects, are collectively referred to as trans-Neptunian objects (TNOs). Pluto is the largest and most massive member of the Kuiper...
    118 KB (13,248 words) - 13:59, 7 May 2025
  • Thumbnail for List of Solar System objects most distant from the Sun
    Sun, but are currently too far away to be observed by telescope. Trans-Neptunian objects are typically announced publicly months or years after their discovery...
    19 KB (674 words) - 12:04, 31 January 2025
  • Thumbnail for Detached object
    objects are a dynamical class of minor planets in the outer reaches of the Solar System and belong to the broader family of trans-Neptunian objects (TNOs)...
    41 KB (2,578 words) - 19:01, 27 February 2025
  • Thumbnail for Fictional planets of the Solar System
    enters the Solar System without threatening impact with other celestial objects appears in Ross Rocklynne's 1938 short story "The Men and the Mirror"....
    53 KB (4,595 words) - 11:34, 15 May 2025
  • Thumbnail for Classical Kuiper belt object
    the classical planets. The name "cubewano" derives from the first trans-Neptunian object (TNO) found after Pluto and Charon: 15760 Albion, which until January...
    22 KB (2,362 words) - 18:25, 1 February 2025
  • Thumbnail for Gonggong (dwarf planet)
    size to Pluto's moon Charon, making it the fifth-largest known trans-Neptunian object (apart possibly from Charon). It may be sufficiently massive to...
    73 KB (6,010 words) - 13:09, 9 April 2025
  • Thumbnail for List of Solar System objects by size
    number of smaller objects of historical or scientific interest, such as comets and near-Earth objects. Many trans-Neptunian objects (TNOs) have been discovered;...
    257 KB (10,930 words) - 14:27, 29 April 2025
  • Thumbnail for 541132 Leleākūhonua
    541132 Leleākūhonua (category Extreme trans-Neptunian objects)
    (/ˌlɛleɪɑːˌkuːhoʊˈnuːə/) (provisional designation 2015 TG387) is an extreme trans-Neptunian object and sednoid in the outermost part of the Solar System. It was first...
    16 KB (1,354 words) - 03:11, 15 April 2025
  • Thumbnail for Astronomical symbols
    abbreviation P when it was considered the ninth planet. The other large trans-Neptunian objects were only discovered around the dawn of the 21st century. They...
    109 KB (6,703 words) - 02:39, 24 April 2025
  • Thumbnail for 120347 Salacia
    120347 Salacia (category Binary trans-Neptunian objects)
    Salacia (minor-planet designation: 120347 Salacia) is a large trans-Neptunian object (TNO) and possible dwarf planet in the Kuiper belt, approximately...
    18 KB (1,411 words) - 11:34, 11 May 2025
  • Thumbnail for Haumea
    Haumea (category Trans-Neptunian objects)
    dwarf planet. Nominal estimates make it the third-largest known trans-Neptunian object, after Eris and Pluto, and approximately the size of Uranus's moon...
    83 KB (7,764 words) - 11:33, 11 May 2025
  • Thumbnail for Planet Nine
    Planet Nine (category Hypothetical trans-Neptunian objects)
    explain the peculiar clustering of orbits for a group of extreme trans-Neptunian objects (ETNOs)—bodies beyond Neptune that orbit the Sun at distances averaging...
    184 KB (19,715 words) - 18:53, 9 May 2025
  • Thumbnail for (55565) 2002 AW197
    (55565) 2002 AW197 (category Minor planet object articles (numbered))
    (provisional designation 2002 AW197) is a classical, non-resonant trans-Neptunian object from the Kuiper belt in the outermost region of the Solar System...
    20 KB (1,383 words) - 16:05, 19 April 2025
  • Thumbnail for Scattered disc
    bodies, which are a subset of the broader family of trans-Neptunian objects. The scattered-disc objects (SDOs) have orbital eccentricities ranging as high...
    39 KB (4,419 words) - 18:29, 14 May 2025
  • Thumbnail for Sednoid
    A sednoid is a trans-Neptunian object with a large semi-major axis and a high perihelion, similar to the orbit of the dwarf planet Sedna. The consensus...
    26 KB (2,383 words) - 17:05, 16 May 2025
  • Thumbnail for Dwarf planet
    remain classified as a planet. Eris (then known as 2003 UB313), a trans-Neptunian object, was discovered in January 2005; it was thought to be slightly larger...
    101 KB (9,264 words) - 16:15, 20 April 2025
  • Thumbnail for Centaur (small Solar System body)
    Small-Body Database lists 910 centaurs. There are an additional 223 trans-Neptunian objects (objects with a semi-major axis further than Neptune's, i.e. 30.1 AU...
    44 KB (4,579 words) - 13:59, 7 April 2025
  • Thumbnail for Minor-planet moon
    planet Haumea was discovered to have two moons, making it the second trans-Neptunian object after Pluto known to have more than one moon. Additionally, 216...
    134 KB (3,052 words) - 22:57, 10 May 2025
  • Tenth planet (disambiguation) Theoretical planetology Trans-Neptunian object Trans-Neptunian objects in fiction "Study reveals secret origins of asteroids...
    20 KB (2,264 words) - 20:54, 9 April 2025
  • List of possible dwarf planets (category Lists of trans-Neptunian objects)
    consideration of the surprisingly low densities of many large trans-Neptunian objects, as well as spectroscopic analysis of their surfaces, suggests...
    63 KB (4,852 words) - 06:29, 16 May 2025
  • liquid-water ocean under its surface. Not enough is known of the larger trans-Neptunian objects to determine whether they are differentiated bodies capable of...
    31 KB (3,080 words) - 13:28, 17 September 2024
  • The following is a partial list of unnumbered trans-Neptunian objects for principal designations assigned within 2014. As of April 2022, it contains a...
    110 KB (96 words) - 20:02, 9 February 2024