KFU. Card publication. Variation of nongravitational parameters of comet Encke as a result of its decay

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FEDERAL UNIVERSITY

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VARIATION OF NONGRAVITATIONAL PARAMETERS OF COMET ENCKE AS A RESULT OF ITS DECAY

Form of presentation

Conference proceedings in Russian journals and collections

Year of publication

2010

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Authors, employees of KFU

Usanin Vladimir Sergeevich, author

Bibliographic description in the original language

Usanin V.S. Variation of nongravitational parameters of comet Encke as a result of its decay // Near-Earth Astronomy-2009. – Moscow: GEOS, 2010. – P. 209–215. (In Russian)

Annotation

Near-Earth Astronomy-2009

Keywords

The name of the journal

Near-Earth Astronomy-2009

URL

http://agora.guru.ru/display.php?conf=oza-2009&page=program&PHPSESSID=6ifgl49ih14machq21if7f1q54

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=106219&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Usanin Vladimir Sergeevich	ru_RU
dc.date.accessioned	2010-01-01T00:00:00Z	ru_RU
dc.date.available	2010-01-01T00:00:00Z	ru_RU
dc.date.issued	2010	ru_RU
dc.identifier.citation	Usanin V.S. Variation of nongravitational parameters of comet Encke as a result of its decay // Near-Earth Astronomy-2009. – Moscow: GEOS, 2010. – P. 209–215. (In Russian)	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=106219&p_lang=2	ru_RU
dc.description.abstract	Near-Earth Astronomy-2009	ru_RU
dc.description.abstract	It is well known that nongravitational parameters of comets in the most extensively applicated in practice Marsden's model vary with time. The behaviour of nongravitational parameters of comet Encke is the most studied. In this work an assumption is made that these variations are due to the secular decay of comets as a result of volatile materials loss. To explain the decrease of nongravitational forces, an accelerated decrease of relation of effective evaporating area to mass compared with the uniform nucleus is required. Three variants of such nonuniformity are proposed: 1) deposition of a substantial nonvolatile mass not impending the sublimation; 2) generation of a little-massive crust shrinking the effective area by a linear law; 3) generation of a little-massive crust shrinking the effective area by an exponential law. Differential equations for all three cases (with the additional assumption of the nucleus constant shape) are derived, whose solutions are consistent qualitatively with the observed variation of nongravitational parameters of comet Encke. The adequacy of former two models over more than 150 years interval is shown. Possible causes of deviations out of this are reviewed.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject		ru_RU
dc.title	Variation of nongravitational parameters of comet Encke as a result of its decay	ru_RU
dc.type	Conference proceedings in Russian journals and collections	ru_RU