Английская Википедия:5335 Damocles
(5335) Damocles Шаблон:IPAc-en, provisional designation Шаблон:Mp, is a centaur and the namesake of the damocloids, a group of minor planets which may be inactive nuclei of the Halley-type and long-period comets. It was discovered on 18 February 1991, by Australian astronomer Robert McNaught at Siding Spring Observatory in Australia. It is named after Damocles, a figure of Greek mythology.[1]
Description
When Damocles was discovered, it was found to be on an orbit completely different from all others known. DamoclesШаблон:'s orbit reached from inside the aphelion of Mars to as far as Uranus. It seemed to be in transition from a near-circular outer Solar System orbit to an eccentric orbit taking it to the inner Solar System.[2] Duncan Steel, Gerhard Hahn, Mark Bailey, and David Asher carried out projections of its long-term dynamical evolution, and found a good probability that it will become an Earth-crosser asteroid, and may spend a quarter of its life in such an orbit. Damocles has a stable orbit for tens of thousands of years before and after the present, because its highly inclined orbit does not take it near Jupiter or Saturn.[3][4]
There is some speculation that Damocles may have a meteor shower associated with it on Mars from the direction of Draco.[5] The object has a Mars minimum orbit intersection distance (Mars MOID) of Шаблон:Convert and a Uranus MOID of Шаблон:Convert.[6]
Шаблон:As of, Damocles is 19.6 AU from the Sun with an apparent magnitude of 26.3 .[7] It reached its furthest point from the Sun in 2011.
The adjectival form is Damoclean, Шаблон:IPA.[8] The official naming citation was published by the Minor Planet Center on 1 September 1993 (Шаблон:Small).[9]
See also
- The sword of Damocles – an over-hanging threat, a long-standing political metaphor from ancient Greece.
References
External links
- Шаблон:Cite web
- Шаблон:Cite web
- Шаблон:Cite web
- Шаблон:Cite book
- Шаблон:Cite web
- Шаблон:Cite web
- Шаблон:JPL Small Body
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control
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- Английская Википедия
- Centaurs (small Solar System bodies)
- Damocloids
- Unusual minor planets
- Discoveries by Robert H. McNaught
- Named minor planets
- Mars
- Astronomical objects discovered in 1991
- Страницы, где используется шаблон "Навигационная таблица/Телепорт"
- Страницы с телепортом
- Википедия
- Статья из Википедии
- Статья из Английской Википедии
- Страницы с ошибками в примечаниях
