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Group of trans-Neptunian objects
A sednoid is a trans-Neptunian object with a large semi-major axis, a distant perihelion and a highly eccentric orbit, similar to that of the dwarf planet
Sednoid
Sednoid
provisional designation 2015 TG387) is an extreme trans-Neptunian object and sednoid in the outermost part of the Solar System. It was first observed on 13
541132_Leleākūhonua
Distant body in the outer Solar System
characterized by highly eccentric orbits with very distant perihelia, the sednoids. The astronomer Michael E. Brown, co-discoverer of Sedna, has argued that
Sedna_(dwarf_planet)
Solar system objects beyond the other known trans-Neptunian objects
than the scattered ETNOs, but are still relatively close to Neptune. The sednoid or inner Oort cloud objects, with perihelia beyond 50–60 AU, are too far
Extreme trans-Neptunian object
Extreme_trans-Neptunian_object
Solar system objects beyond Neptune
objects of the Kuiper belt, the scattered disc and detached objects with the sednoids being the most distant ones. As of February 2025, the catalog of minor
Trans-Neptunian_object
Sednoid
known TNOs with high-perihelion elliptical orbits (sometimes known as sednoids), which challenges the hypothesis that an unseen distant planet ("Planet
2023_KQ14
Large trans-Neptunian object in the scattered disc
00071 to 0.02546 ly) away from the Sun. 2017 OF201 is not considered a sednoid because its perihelion or closest point to the Sun is below 60 AU, which
2017_OF201
Sednoid
extremely distant and markedly elliptical orbit. It is classified as a sednoid because its orbit never comes closer than 80.5 AU (12.04 billion km; 7
2012_VP113
Topics referred to by the same term
goddess after whom said dwarf planet is named. Sedna may also refer to: Sednoid, a group of Trans-Neptunian objects in our Solar System Sedna (beverage)
Sedna
Dynamical class of minor planets
perihelion orbits similar to that of Sedna are termed sednoids. As of 2025, there are four known sednoids, including 2012 VP113, Leleākūhonua, and 2023 KQ14
Detached_object
Trans-Neptunian object
highest perihelia of any known extreme trans-Neptunian object, behind sednoids including Sedna (76 AU), 2012 VP113 (80 AU), and Leleākūhonua (65 AU).
2013_SY99
Area of the Solar System beyond the planets, comprising small bodies
(1:2 resonance) Scattered disc objects (SDOs) Resonant SDOs Extreme trans-Neptunian objects Detached objects Sednoids Oort cloud objects (ICO/OCOs) v t e
Kuiper_belt
Planetary system consisting of the Sun and objects orbiting it
than the scattered ETNOs, but are still relatively close to Neptune. The sednoids or inner Oort cloud objects, with perihelia beyond 50–60 AU, are too far
Solar_System
perihelion at a distance of 76 AU from the Sun. Sedna is the largest known sednoid, a class of objects that play an important role in the Planet Nine hypothesis
List of Solar System objects most distant from the Sun
List_of_Solar_System_objects_most_distant_from_the_Sun
Collection of bodies in the extreme Solar System
resonance with Neptune are in red. Extreme trans-Neptunian objects and sednoids are in pink, brown, and yellow. Finally, the classical Kuiper belt is in
Scattered_disc
Region between the orbits of Mars and Jupiter
trans-Neptunian objects (Kuiper belt objects, scattered disc objects, sednoids, and Oort cloud objects.) Ceres, the only object in the asteroid belt large
Asteroid_belt
Natural physical entity in space
Plutinos (2:3) Twotinos (1:2) Scattered disc objects Detached objects Sednoids Exoplanets Chthonian (theoret.) Earth analog Eccentric Jupiter Exomoon
Astronomical_object
Small planetary-mass object
in each orbital population (asteroid belt, Kuiper belt, scattered disc, sednoids). All other known objects in these populations have smaller discriminants
Dwarf_planet
Kuiper belt object, not controlled by an orbital resonance with Neptune
distribution of cubewanos (blue), resonant TNOs (red), SDOs (grey) and sednoids (yellow). Right: Comparison of the aligned orbits (polar and ecliptic view)
Classical_Kuiper_belt_object
Comprehensive list of objects beyond Neptune
and the extreme trans-Neptunian objects including the ESDOs, EDDOs, and sednoids, which have a semi-major axis of at least 150 AU and a perihelion (closest
List of trans-Neptunian objects
List_of_trans-Neptunian_objects
Distant planetesimals in the Solar System
(1:2 resonance) Scattered disc objects (SDOs) Resonant SDOs Extreme trans-Neptunian objects Detached objects Sednoids Oort cloud objects (ICO/OCOs) v t e
Oort_cloud
Scattered disc object
and Trujillo had discovered several large TNOs with DECam—namely, the sednoid 2012 VP113 and the scattered disc object 2013 FZ27, which were announced
532037_Chiminigagua
Hypothetical Solar System planet
The announcement in March 2014 of the discovery of 2012 VP113, a second sednoid in a similar orbit but with a perihelion distance of 80 AU led to renewed
Planet_Nine
belt – Area of the Solar System beyond the planets, comprising small bodies Sednoid – Group of trans-Neptunian objects Detached object – Dynamical class of
List of Solar System objects by greatest aphelion
List_of_Solar_System_objects_by_greatest_aphelion
(Distant minor planets) Kuiper belt Plutinos Cubewanos Arrokoth Other Sednoids Detached objects Damocloids Oort cloud objects Hills cloud Comets Lists
Lists_of_planets
Larger of the two moons of Mars
(Distant minor planets) Kuiper belt Plutinos Cubewanos Arrokoth Other Sednoids Detached objects Damocloids Oort cloud objects Hills cloud Comets Lists
Phobos_(moon)
Stony main-belt asteroid
(Distant minor planets) Kuiper belt Plutinos Cubewanos Arrokoth Other Sednoids Detached objects Damocloids Oort cloud objects Hills cloud Comets Lists
3_Juno
possible global ocean under the ice (c. 150–250 km) Sedna dwarf planet (sednoid) ? (internal global ocean?) water? water–ammonia mixture? subsurface, global
List of largest lakes and seas in the Solar System
List_of_largest_lakes_and_seas_in_the_Solar_System
binary 2004 Sedna 90377 453+157 −129 0.0785 0.516 0.0005 dwarf planet; sednoid; detached object 2003 Salacia 120347 419±22 0.0664 0.373 0.0003 0.4861+0
List of Solar System objects by size
List_of_Solar_System_objects_by_size
(Distant minor planets) Kuiper belt Plutinos Cubewanos Arrokoth Other Sednoids Detached objects Damocloids Oort cloud objects Hills cloud Comets Lists
List of tallest mountains in the Solar System
List_of_tallest_mountains_in_the_Solar_System
Type of Solar System object
(1:2 resonance) Scattered disc objects (SDOs) Resonant SDOs Extreme trans-Neptunian objects Detached objects Sednoids Oort cloud objects (ICO/OCOs) v t e
Centaur (small Solar System body)
Centaur_(small_Solar_System_body)
Trans-Neptunian object
2015 TH367 but another discovery from the same night's observation, the sednoid 2015 TG387, now known as 541132 Leleākūhonua, that had also been announced
2015_TH367
Largest moon of Saturn
(Distant minor planets) Kuiper belt Plutinos Cubewanos Arrokoth Other Sednoids Detached objects Damocloids Oort cloud objects Hills cloud Comets Lists
Titan_(moon)
Astronomical object that is neither a planet nor a comet
Sedna, with both an aphelion and a perihelion outside the Kuiper belt. Sednoids, detached objects with a perihelion greater than 75 AU (Sedna, 2012 VP113
Minor_planet
Trans-Neptunian objects Kuiper belt Cubewanos Plutinos Detached objects Sednoids Scattered disc Hills cloud Oort cloud Oort limit Related Double planet
Timeline of Solar System astronomy
Timeline_of_Solar_System_astronomy
Large, round non-stellar astronomical object
Trans-Neptunian objects Kuiper belt Cubewanos Plutinos Detached objects Sednoids Scattered disc Hills cloud Oort cloud Oort limit Related Double planet
Planet
Innermost Galilean moon of Jupiter
Trans-Neptunian objects Kuiper belt Cubewanos Plutinos Detached objects Sednoids Scattered disc Hills cloud Oort cloud Oort limit Related Double planet
Io_(moon)
2012 VP113 5 November 2012 Cerro Tololo Observatory, La Serena (807) 585 sednoid 269.7 0.70 24 80.6 458.7 albedo: 0.124; BRmag: 1.44 MPC · JPL 2012 WE37
List of unnumbered trans-Neptunian objects: 2012
List_of_unnumbered_trans-Neptunian_objects:_2012
discovery of 2023 KQ14, a trans-Neptunian object and the fourth known sednoid. 16 April Scientists report a new method of generating electricity from
2025_in_science
occur. A more typical member of the extended disk is (148209) 2000 CR105. Sednoids have perihelia very far removed from the orbit of Neptune. This group is
List_of_minor-planet_groups
Trans-Neptunian object in a mean-motion orbital resonance with Neptune
(1:2 resonance) Scattered disc objects (SDOs) Resonant SDOs Extreme trans-Neptunian objects Detached objects Sednoids Oort cloud objects (ICO/OCOs) v t e
Resonant trans-Neptunian object
Resonant_trans-Neptunian_object
Planets visible to the naked eye
Trans-Neptunian objects Kuiper belt Cubewanos Plutinos Detached objects Sednoids Scattered disc Hills cloud Oort cloud Oort limit Related Double planet
Classical_planet
November 14, 2003 Palomar M. E. Brown, C. A. Trujillo, D. L. Rabinowitz sednoid 995 km MPC · JPL 90378 2003 WL23 — November 18, 2003 Kitt Peak Spacewatch
List of minor planets: 90001–91000
List_of_minor_planets:_90001–91000
Trans-Neptunian object
distant objects along with the predicted orbit of Planet Nine. The three sednoids (pink) along with the red-colored extreme trans-Neptunian object (eTNO)
(87269)_2000_OO67
October 13, 2015 Mauna Kea D. J. Tholen, C. A. Trujillo, S. S. Sheppard sednoid 220 km MPC · JPL 541133 2002 QN103 — August 18, 2002 Palomar NEAT · 3
List of minor planets: 541001–542000
List_of_minor_planets:_541001–542000
Vast, theoretical circumstellar disc
would be "younger" than the Oort cloud. However, only Sedna and two other sednoids (2012 VP113 and 541132 Leleākūhonua) bear those irregularities; for 2000
Hills_cloud
(Distant minor planets) Kuiper belt Plutinos Cubewanos Arrokoth Other Sednoids Detached objects Damocloids Oort cloud objects Hills cloud Comets Lists
List of largest craters in the Solar System
List_of_largest_craters_in_the_Solar_System
Trans-Neptunian object and centaur
distant objects along with the predicted orbit of Planet Nine. The three sednoids (pink) along with the red-colored extreme trans-Neptunian object (eTNO)
(668643)_2012_DR30
(Distant minor planets) Kuiper belt Plutinos Cubewanos Arrokoth Other Sednoids Detached objects Damocloids Oort cloud objects Hills cloud Comets Lists
List_of_Solar_System_extremes
Overview of and topical guide to the Solar System
Trans-Neptunian objects Kuiper belt Cubewanos Plutinos Detached objects Sednoids Scattered disc Hills cloud Oort cloud Oort limit Related Double planet
Outline_of_the_Solar_System
index. Members of the extreme trans-Neptunian objects (ESDOs, EDDOs and sednoids) – with a semi-major axis greater than 150 AU and perihelion greater than
List of unnumbered trans-Neptunian objects
List_of_unnumbered_trans-Neptunian_objects
Key † Asteroid belt ‡ Kuiper belt § Scattered disc × Sednoid
List of gravitationally rounded objects of the Solar System
List_of_gravitationally_rounded_objects_of_the_Solar_System
Trans-Neptunian object
distant objects along with the predicted orbit of Planet Nine. The three sednoids (pink) along with the red-colored extreme trans-Neptunian object (eTNO)
(709487)_2013_BL76
Detached object
distant objects along with the predicted orbit of Planet Nine. The three sednoids (pink) along with the red-colored extreme trans-Neptunian object (eTNO)
2010_GB174
(Distant minor planets) Kuiper belt Plutinos Cubewanos Arrokoth Other Sednoids Detached objects Damocloids Oort cloud objects Hills cloud Comets Lists
List of largest rifts, canyons and valleys in the Solar System
List_of_largest_rifts,_canyons_and_valleys_in_the_Solar_System
Detached extreme trans-Neptunian object
distant objects along with the predicted orbit of Planet Nine. The three sednoids (pink) along with the red-colored extreme trans-Neptunian object (eTNO)
474640_Alicanto
Trans-Neptunian object
involved in the discoveries of several other distant TNOs, including the sednoids 2012 VP113 and 541132 Leleākūhonua. 2018 VG18 was first identified as a
2018_VG18
Trans-Neptunian object
distant objects along with the predicted orbit of Planet Nine. The three sednoids (pink) along with the red-colored extreme trans-Neptunian object (eTNO)
2005_VX3
Minor planets orbiting in the outer Solar system beyond Jupiter
(1:2 resonance) Scattered disc objects (SDOs) Resonant SDOs Extreme trans-Neptunian objects Detached objects Sednoids Oort cloud objects (ICO/OCOs) v t e
Distant_minor_planet
Trans-Neptunian object
perihelion of 41.5 AU, contrary to the extended-scattered/detached objects and sednoids, the latter of which stay well beyond the Kuiper cliff at 47.8 AU. 2015
(674118)_2015_KH162
Trans-Neptunian objects Kuiper belt Cubewanos Plutinos Detached objects Sednoids Scattered disc Hills cloud Oort cloud Oort limit Related Double planet
Historical models of the Solar System
Historical_models_of_the_Solar_System
Asteroid sharing the orbit of Neptune
(1:2 resonance) Scattered disc objects (SDOs) Resonant SDOs Extreme trans-Neptunian objects Detached objects Sednoids Oort cloud objects (ICO/OCOs) v t e
Neptune_trojan
Extreme trans-Neptunian object
perihelion gap that separates the detached objects from the more distant sednoids; dynamical studies indicate that such objects in the inner edge of this
2021_RR205
Trans-Neptunian object and highly eccentric centaur
distant objects along with the predicted orbit of Planet Nine. The three sednoids (pink) along with the red-colored extreme trans-Neptunian object (eTNO)
(308933)_2006_SQ372
(Distant minor planets) Kuiper belt Plutinos Cubewanos Arrokoth Other Sednoids Detached objects Damocloids Oort cloud objects Hills cloud Comets Lists
List of craters in the Solar System
List_of_craters_in_the_Solar_System
American astronomer
Trans-Neptunian objects Kuiper belt Cubewanos Plutinos Detached objects Sednoids Scattered disc Hills cloud Oort cloud Oort limit Related Double planet
Craig_Chester_(astronomer)
Small Solar System body
distant objects along with the predicted orbit of Planet Nine. The three sednoids (pink) along with the red-colored extreme trans-Neptunian object (eTNO)
2013_AZ60
Trans-Neptunian object
aphelion distance is similar to that of the detached objects such as the sednoids (e.g. 90377 Sedna), its perihelion distance, however, is much lower and
(523622)_2007_TG422
2015 TG387 (also known as "The Goblin"), a trans-Neptunian object and sednoid in the outermost part of the Solar System, which may help explain some
2018_in_science
American planetary scientist
1981, was named in her honor (M.P.C. 103979). She specialized in studying sednoids, and co-discovered several trans-Neptunian objects. Megan Schwamb is credited
Megan_Schwamb
Trans-Neptunian object
perihelion of 37.7 AU, contrary to the extended-scattered/detached objects and sednoids which never approach Neptune as close. It has also been described as a
(612584)_2003_QX113
SEDNOID
SEDNOID
SEDNOID
SEDNOID
Boy/Male
Tamil
Victorious
Boy/Male
Arabic
Unique; Single
Boy/Male
French Latin
Dealer of herbs.
Girl/Female
Tamil
Bhagyashri | பாகà¯à®¯à®·à¯à®°à¯€
Goddess Lakshmi, Lucky
Boy/Male
Hindu, Indian
Trustworthy and Handsome
Girl/Female
Arabic, French
Equal to Another Person; Rival
Boy/Male
Tamil
Young
Boy/Male
Indian
Intended, Aimed at, Object, Proposed
Girl/Female
Australian, Czechoslovakian, French, German, Greek, Romanian, Swedish
Innocent; Pure; Torture
Boy/Male
Hindu, Indian, Traditional
Lord Krishna; Shiva
SEDNOID
SEDNOID
SEDNOID
SEDNOID
SEDNOID