Английская Википедия:2014 ST373

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Шаблон:Mp (prov. designation: Шаблон:Mp) is a trans-Neptunian object and a detached object from the outermost region of the Solar System. With a perihelion of 50.2 AU, it belongs to the top 10 minor planets with the highest known perihelia of the Solar System.Шаблон:Efn and is neither a scattered disc nor an extreme trans-Neptunian object. It measures approximately Шаблон:Convert in diameter and was first observed on 25 September 2014, by astronomers using the Dark Energy Camera (DECam) at Cerro Tololo Inter-American Observatory in Chile.

Orbit and classification

Шаблон:Mp orbits the Sun at a distance of 50.2–158.9 AU once every 1069 years; semi-major axis of 104.53 AU. Its orbit has an eccentricity of 0.52 and an inclination of 43.16° with respect to the ecliptic.

Шаблон:Mp is a distant minor planet and trans-Neptunian object (TNO) beyond the orbit of Neptune and the Kuiper cliff. Шаблон:Asof, it has the 8th highest perihelia of all known minor planets. Based on a still sufficiently determined perihelion a of 50.2 AU, it is not a member of the scattered disc population, as these objects are thought to have been ejected from the classical Kuiper belt into their current orbits by gravitational interactions with Neptune (semi-major axis of 30.1 AU), and typically have highly eccentric orbits and perihelia of less than 38 AU. Шаблон:Mp's orbit, however, has never brought it close enough to Neptune to be gravitational disturbed.

On the other hand, this TNO is not an extreme trans-Neptunian object as these objects generally have higher perihelia and/or higher eccentricities. Instead, it is located in a virtually unpopulated region at a perihelion of 50 AU and an eccentricity of 0.5 (see adjunct images, where the grid crosses at q=50 AU and e=0.5)

The Kozai mechanism is capable of transferring orbital eccentricity to a higher inclination. It can be speculated that this dynamical phenomenon also affected the orbit of Шаблон:Mp. If this was the case, and the object had once belonged to the extreme detached disc objects – which have eccentricities above 0.8 and semi-major axes of at least 250 AU, for a perihelion of 50 AU – the Kozai effect would have slowly decreased Шаблон:MpШаблон:'s aphelion from over 450 AU to currently 159 AU while increasing its inclination. Шаблон:Mp seems to belong to the same group as Шаблон:Mpl.Шаблон:Citation needed

Physical characteristics

Diameter and albedo

Based on an absolute magnitude of 5.4, and an assumed astronomical albedo of 0.9, which is a standard default value adopted for trans-Neptunian objects by Johnston's archive, Шаблон:Mp measures approximately Шаблон:Convert in diameter. The body's color, rotation period, pole and shape remain unknown.

External links

• Trans-Neptunian objects found in the first four years of the Dark Energy Survey, 11 Feb 2020
• 2014 ST373: a detached object not in resonance with Neptune announced today, Groups.io, 4 Feb 2020