Английская Википедия:77 Frigga
Шаблон:Short description Шаблон:Use dmy dates Шаблон:Infobox planet
Frigga (minor planet designation: 77 Frigga) is a large, M-type, possibly metallic main-belt asteroid. It was discovered by the German-American astronomer C. H. F. Peters on November 12, 1862. The object is named after Frigg, the Norse goddess. The asteroid is orbiting the Sun with a period of 4.36 years and completes a rotation on its axis every nine hours.
Frigga has been studied by radar.[1] The spectra of this asteroid displays a feature at a wavelength of 3 μm, indicating the presence of hydrated minerals on the surface.[2] The near infrared spectrum is reddish and shows no spectral absorption features. Potential analogs of this spectrum include enstatite chondrites and nickel-iron meteorites.[3]
Since 1999 there have been four stellar occultations by the asteroid. The first three were single chord observations, and the fourth was a 3-chord observation, and a miss. The best fit ellipse measures 60.0x74.0 kilometres at PA -14degrees.[4]
References
External links
- Lightcurve plot of 77 Frigga, Palmer Divide Observatory, B. D. Warner (2012)
- Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- Шаблон:AstDys
- Шаблон:JPL small body
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control
- ↑ Шаблон:Cite web
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокGilHutton2007не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокTakir2008не указан текст - ↑ Шаблон:Cite web
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- Astronomical objects discovered in 1862
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