Английская Википедия:234 Barbara
Шаблон:Short description Шаблон:Infobox planet
Barbara (minor planet designation: 234 Barbara) is a main belt asteroid that was discovered by German-American astronomer Christian Heinrich Friedrich Peters on August 12, 1883, in Clinton, New York. The object is orbiting the Sun with a semimajor axis of Шаблон:Val, a period of 3.68 years, and an eccentricity of 0.25. The orbital plane is inclined by 15.37° to the plane of the ecliptic. It is classified as a stony S-type asteroid based upon its spectrum. The mean diameter of this object is estimated as 45.6 km.[1] It has a rotation rate of 26.5 hours, or a little over a day. It is possibly named for Saint Barbara, patron saint of mathematicians.[2][3]
Observations of light curves and stellar occultations suggest the surface exhibits large concave areas.[4] Polarimetric study of this asteroid reveals anomalous properties that suggests the regolith consists of a mixture of low and high albedo material. This may have been caused by fragmentation of an asteroid substrate with the spectral properties of CO3/CV3 carbonaceous chondrites.[5] It is the prototype for a class of asteroids called "Barbarians" that display a strong infrared absorption band at 2μm, which is a characteristic of an FeO–enriched spinel mineral. Multiple other examples of this class have since been discovered.[6]
Observations made in 2009 with ESO's Very Large Telescope Interferometer (VLTI) suggested that 234 Barbara may be a binary asteroid,[7] although a paper published in 2015 states that "the VLTI observations can be explained without the presence of a large satellite".[4]
References
External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- Asteroid Lightcurve Data File
- Шаблон:AstDys
- Шаблон:JPL small body
Шаблон:Use dmy dates Шаблон:Minor planets navigator Шаблон:Small Solar System bodies
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокCarry2012не указан текст - ↑ Шаблон:Cite book
- ↑ Шаблон:Cite web
- ↑ 4,0 4,1 Ошибка цитирования Неверный тег
<ref>; для сносокTanga2015не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокGilHutton2008не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокDevogèle2018не указан текст - ↑ Шаблон:Cite web
- Английская Википедия
- S-type asteroids (Tholen)
- Ld-type asteroids (SMASS)
- Background asteroids
- Discoveries by Christian Peters
- Named minor planets
- Astronomical objects discovered in 1883
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
- Страницы с ошибками в примечаниях
