(9) Метида

У этого термина существуют и другие значения, см. Метида.
(9) Метида Символ Метиды
Астероид
Снимок сделан телескопом VLT (спектрограф SPHERE[англ.])
Снимок сделан телескопом VLT (спектрограф SPHERE[англ.])
Открытие
Первооткрыватель Эндрю Грэм
Место обнаружения Маркрийская обсерватория[3]
Дата обнаружения 25 апреля 1848
Альтернативные обозначения 1974 QU2
Категория Главное кольцо
Орбитальные характеристики[1]
Эпоха 30 ноября 2008
Эксцентриситет (e) 0,122
Большая полуось (a) 356,941 млн км
(2,386 а. е.)
Перигелий (q) 313,394 млн км
(2,095 а. е.)
Афелий (Q) 400,487 млн км
(2,677 а. е.)
Период обращения (P) 1346,183 сут (3,686 г.)
Средняя орбитальная скорость 19,21 км/с
Наклонение (i) 5,575°
Долгота восходящего узла (Ω) 68,961°
Аргумент перигелия (ω) 6,318°
Средняя аномалия (M) 340,983°
Физические характеристики
Диаметр 190 км
Масса (1,47 ± 0,20)⋅1019 кг
Плотность 4,12±1,33 г/см³[2]
Ускорение свободного падения на поверхности 0,152 м/с²
2-я космическая скорость 169,67 м/с
Период вращения 5,079 ч
Спектральный класс S
Абсолютная звёздная величина 6,28m
Альбедо 0,118
Средняя температура поверхности 173 К (−100 °C)
Логотип Викиданных Информация в Викиданных ?

(9) Мети́да (лат. Metis) — астероид главного астероидного пояса. Открыт 25 апреля 1848 году ирландским астрономом Эндрю Грэмом в Маркрийской обсерватории (Ирландия). Метида является единственным астероидом открытым Грэмом, а до 7 октября 2008 года была и единственным астероидом открытым с территории Ирландии. Астероид назван в честь древнегреческой богини мудрости Метиды[4].

Астероид обращается вокруг Солнца за 3,69 юлианских года[1].

В 2007 году массу Метиды оценивали от 1,6 до 2,5⋅1019 кг[2]. Это давало плотность ~ 6 (3,3 до 8,9) г/см ³. По оценке Джеймса Бэра 2010 года, масса Метиды составляет (1,47 ± 0,20)⋅1019 кг, а плотность — 4,12±1,33 г/см³[5].

См. также

Примечания

  1. ↑ 1 2 JPL Small-Body Database Browser: 89 Metis. Дата обращения: 11 октября 2008. Архивировано 12 февраля 2012 года.
  2. ↑ 1 2 Astrometric masses of 21 asteroids, and an integrated asteroid ephemeris. Celestial Mechanics and Dynamical Astronomy. 2008. Дата обращения: 11 октября 2008. Архивировано из оригинала 24 февраля 2011 года.
  3. ↑ JPL Small-Body Database
  4. ↑ Dictionary of minor planet names. Lutz D. Schmadel, International Astronomical Union.
  5. ↑ Recent Asteroid Mass Determinations. Дата обращения: 11 октября 2008. Архивировано из оригинала 24 февраля 2011 года.

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