Английская Википедия:(528381) 2008 ST291

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Шаблон:Use dmy dates

Шаблон:Infobox planet

Шаблон:Mp, provisional designation Шаблон:Mp, is a 1:6 resonant trans-Neptunian object located in the outermost region of the Solar System that takes almost a thousand years to complete an orbit around the Sun.[1] It was discovered on 24 September 2008 by American astronomers Megan Schwamb, Michael Brown and David Rabinowitz at the Palomar Observatory in California, with no known earlier precovery images.[2]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 18 May 2019 (Шаблон:Small).[3] As of 2019, it has not been named.[2]

Orbit and classification

Файл:2008ST291-orbit.png
Orbit comparison of Шаблон:Mp, Pluto and Neptune

Шаблон:See also

Шаблон:Mp is located at the 1:6 Neptune resonance of 99 AU meaning that it completes roughly 1 orbit for every 6 orbits Neptune makes.[4] It orbits the Sun at a distance of 42.3–157.5 AU once every 998 years and 4 months (semi-major axis of 99.89 AU). Its orbit has an eccentricity of 0.58 and an inclination of 21° with respect to the ecliptic.[5] Currently located at 60.9 AU from the Sun,[6] the object came to perihelion in 1954.[5]

Physical characteristics

Based on an absolute magnitude of 4.4,[2] Шаблон:Mp is estimated by the Johnston's Archive to be about Шаблон:Convert in diameter, assuming a typical albedo of 0.09 for trans-Neptunian objects.[4] Astronomer Mike Brown estimates a slightly smaller 549 km from the same albedo and a fainter 4.6 magnitude.[1] The Asteroid Dynamic Site records a brighter 4.3 magnitude, which calculates to 612 km using the same albedo (and same formula as Johnston's); using the average of these magnitudes and a standard assumed minor planet albedo range of 0.25 ~ 0.05, possible sizes of 345 to 773 km are produced.

See also

Notes

Шаблон:Notelist

References

Шаблон:Reflist

External links

Шаблон:Dwarf planets Шаблон:Trans-Neptunian objects Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control

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  1. ↑ 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок Brown-dplist не указан текст
  2. ↑ 2,0 2,1 2,2 Ошибка цитирования Неверный тег <ref>; для сносок MPC-object не указан текст
  3. ↑ Ошибка цитирования Неверный тег <ref>; для сносок MPC-Circulars-Archive не указан текст
  4. ↑ 4,0 4,1 Ошибка цитирования Неверный тег <ref>; для сносок johnstonsarchive-TNO-list не указан текст
  5. ↑ 5,0 5,1 Ошибка цитирования Неверный тег <ref>; для сносок jpldata не указан текст
  6. ↑ Ошибка цитирования Неверный тег <ref>; для сносок AstDyS не указан текст
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