Английская Википедия:(118378) 1999 HT11
Шаблон:Use dmy dates Шаблон:Infobox planet
Шаблон:Mp, provisional designation: Шаблон:Mp, is a trans-Neptunian object from the outermost region of the Solar System, locked in a 4:7 orbital resonance with Neptune. It was discovered on 17 April 1999, by astronomers at the Kitt Peak Observatory, Arizona, in the United States.[1] The very red object measures approximately Шаблон:Convert in diameter. Шаблон:As of, it has not been named.
Discovery
Шаблон:Mp was first observed on the night of 17 April 1999, by astronomers using the 4-meter Nicholas U. Mayall Telescope at Kitt Peak National Observatory in Arizona. Five additional objects were discovered on the same weekend: Шаблон:LoMP, [[List of unnumbered minor planets: 1999 A–R#1999 HS11|Шаблон:Mp]], [[53311 Deucalion|Шаблон:Mp]] (Deucalion), [[List of unnumbered minor planets: 1999 A–R#1999 HV11|Шаблон:Mp]] and Шаблон:LoMP. The observing astronomers were Robert Millis, James Elliot, Matthew Holman, Mark Wagner as well as Kim Falinski. Follow-up observations with the Nordic Optical Telescope at the Roque de los Muchachos Observatory, La Palma, Spain, were made three weeks later. The body's observation arc begins with its official discovery observation at Kitt Peak on 17 April 1999.[2][1]
Orbit and classification
This minor planet orbits the Sun at a distance of 38.7–49.0 AU once every 290 years and 7 months (106,124 days; semi-major axis of 43.87 AU). Its orbit has an eccentricity of 0.12 and an inclination of 5° with respect to the ecliptic.[3] Шаблон:As of, it is at 39.7 AU from the Sun with an apparent magnitude of 23.42,[4] and will come to perihelion in 2047.[3]
Шаблон:Mp is a resonant trans-Neptunian object that stays in a 4:7 mean-motion orbital resonance with Neptune, orbiting exactly four times the Sun for every seven orbits Neptune does and are therefore protected from the planets scattering effect. The classification is deemed secure.[5][6] The 4:7 resonance is located in the midst of the classical objects of the Kuiper belt, a circumstellar disc of otherwise non-resonant bodies, contrary to the more prominent resonant plutinos (2:3) and twotinos (1:2) which form the inner and outer rim of the Kuiper belt, respectively.
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 16 November 2005, receiving the number Шаблон:LoMP in the minor planet catalog (Шаблон:Small).[7] Шаблон:As of, it has not been named.[1] According to the established naming conventions, it will be given a mythological name associated with the underworld or with creation.[8]
Physical characteristics
Шаблон:Mp has a very red surface color (RR) in the visible part of the spectrum, with B−V and V–R color indices of Шаблон:Val and Шаблон:Val, respectively, for a combined B−R magnitude of Шаблон:Val.[5][9][10] A red surface color is typically associated with the presence of tholins, polymer-like organic compounds, formed by long exposures to solar and cosmic radiation.
Based on a generic magnitude-to-diameter conversion, Шаблон:Mp measures approximately Шаблон:Convert in diameter, for an assumed albedo of 0.9 and an magnitude of 7.6.[5][11] According to Mike Brown, who estimates a mean-diameter of Шаблон:Convert, the object is too small for being considered a dwarf planet candidate ("probably not").[12] As of 2021, no rotational lightcurve for this body has been obtained from photometric observations. Its rotation period, pole and shape remain unknown.[3]
References
External links
- List of Transneptunian Objects, Minor Planet Center
- (118378) 1999 HT11, Small Bodies Data Ferret
- Discovery Circumstances: Numbered Minor Planets (115001)-(120000), Minor Planet Center
- Шаблон:AstDys
- Шаблон:JPL small body
Шаблон:Trans-Neptunian objects Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control
- ↑ 1,0 1,1 1,2 Ошибка цитирования Неверный тег
<ref>
; для сносокMPC-object
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокMPEC-1999
не указан текст - ↑ 3,0 3,1 3,2 Ошибка цитирования Неверный тег
<ref>
; для сносокjpldata
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокAstDys-object
не указан текст - ↑ 5,0 5,1 5,2 Ошибка цитирования Неверный тег
<ref>
; для сносокJohnston-TNOs
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокBuie-DES
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокMPC-Circulars-Archive
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокIAU-nomenclature
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокSheppard-2013b
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокlcdb
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокh
не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>
; для сносокBrown-dplist
не указан текст
- Страницы с игнорируемыми отображаемыми названиями
- Английская Википедия
- Trans-Neptunian objects in a 4:7 resonance
- Discoveries by the Kitt Peak National Observatory
- Astronomical objects discovered in 1999
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
- Страницы с ошибками в примечаниях