Английская Википедия:2014 FZ71

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Шаблон:Use dmy dates Шаблон:Infobox planet Шаблон:Mp is a trans-Neptunian object, a scattered disc classified as a scattered and detached object, located in the outermost region of the Solar System. It was first observed on 24 March 2014, by a team led by American astronomer Scott Sheppard at the Cerro Tololo Inter-American Observatory in Chile. With its perihelion of almost 56 AU, it belongs to a small and poorly understood group of very distant objects with moderate eccentricities. The object is not a dwarf planet candidate as it only measures approximately Шаблон:Convert in diameter.

Discovery and naming

Шаблон:Mp was first observed on 24 March 2014 by a team of astronomers led by Scott Sheppard of the Carnegie Institution for Science as part of the survey for distant solar system objects beyond the Kuiper Cliff using the new wide-field cameras on the Subaru and Cerro Tololo Inter-American Observatory (CTIO) telescopes.

Orbit and classification

Файл:Extreme transneptunian object eccentricity vs perihelion.png

The object is located in the "gap", a poorly understood region.

Шаблон:Mp orbits the Sun at a distance of 55.8–95.8 AU once every 660 years and 3 months (241,142 days; semi-major axis of 75.82 AU). Its orbit has a moderate eccentricity of 0.26 and an inclination of 26° with respect to the ecliptic.

The object belongs to the same orbital group as Шаблон:Mpl ("Buffy"), Шаблон:Mpl, Шаблон:Mpl and Шаблон:Mpl (also see diagram). With an orbital period of 660 years, it seems to be resonant trans-Neptunian objects in a 1:4 resonance with Neptune, as are Шаблон:Mpl and Шаблон:Mp, but with a lower eccentricity and therefore higher perihelion.

Considered a scattered and detached object, Шаблон:Mp is particularly unusual as it has an unusually circular orbit for a scattered-disc object (SDO). Although it is thought that traditional scattered-disc objects have been ejected into their current orbits by gravitational interactions with Neptune, the low eccentricity of its orbit and the distance of its perihelion (SDOs generally have highly eccentric orbits and perihelia less than 38 AU) seems hard to reconcile with such celestial mechanics. This has led to some uncertainty as to the current theoretical understanding of the outer Solar System. The theories include close stellar passages, unseen planet/rogue planets/planetary embryos in the early Kuiper belt, and resonance interaction with an outward-migrating Neptune. The Kozai mechanism is capable of transferring orbital eccentricity to a higher inclination.

Physical characteristics

Шаблон:Mp has a diameter estimated between 125 and 185 kilometers, roughly a quarter the size of Шаблон:Mpl ("Buffy") which is estimated at Шаблон:Convert, roughly a quarter the size of Pluto. It is therefore not a dwarf planet candidate.

External links

• List Of Centaurs and Scattered-Disk Objects, Minor Planet Center
• List of Known Trans-Neptunian Objects, Johnston's Archive
• Шаблон:AstDys
• Шаблон:JPL small body