The Capricornids asteroid-meteoroid complex

Authors

  • Babadzhanov P.B. Institute of Astrophysics, Academy of Sciences of the Republic of Tajikistan, Dushanbe, Tajikistan
  • Kokhirova G.I. Institute of Astrophysics, Academy of Sciences of the Republic of Tajikistan, Dushanbe, Tajikistan
  • Khamroev U.Kh. Institute of Astrophysics, Academy of Sciences of the Republic of Tajikistan, Dushanbe, Tajikistan

UDC

523.532

Abstract

The near-Earth asteroids (NEAs) 2008BO16, 2011EC41, and 2013CT36 are moving on the similar orbits that could be classed as comet-like according to their values of the Tisserand invariant. Investigation of the orbital evolution shows that the NEAs are the quadruple crossers of the Earth's orbit. Consequently, a developed meteoroid stream, possibly associated with them, might produce four meteor showers. Theoretical parameters of the predicted showers were calculated and identified with the observable nighttime σ-Capricornids and χ-Sagittarids, and daytime Capricornids-Sagittarids and χ-Capricornids showers. The comet-like orbits and association with the same meteoroid stream producing four active showers are strong indications that these asteroids have a common cometary origin. Earlier the NEAs (2101) Adonis and 1995CS, which additionally is potentially hazardous asteroid (PHA), were recognized as dormant comets on the base of their association with the same meteoroid stream. So, it may be concluded, that either the considered NEAs are large sized splinters of the Adonis, or all five objects are fragments of a larger comet that was the parent body of the Capricornids meteoroid stream, and whose break-up occurred several tens of thousands years ago.

Keywords:

Near-Earth asteroids, dormant comets, meteoroid stream, meteor showers, orbits, evolution, radiants

Author Infos

Pulat B. Babadzhanov

академик АН РТ, д-р физ.-мат. наук, профессор, заведующий отделом метеорной астрономии Института астрофизики АН Республики Таджикистан

e-mail: p.b.babadzhanov@mail.ru

Gulchekhra I. Kokhirova

д-р физ.-мат. наук, ведущий научный сотрудник отдела метеорной астрономии, заместитель директора по научной работе Института астрофизики АН Республики Таджикистан

e-mail: kokhirova2004@mail.ru

Umedzhon Kh. Khamroev

младший научный сотрудник отдела метеорной астрономии Института астрофизики АН Республики Таджикистан

e-mail: umed-1982@mail.ru

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Issue

2013. No. 4. Part 3

Pages

20-25

Submitted

2013-10-04

Published

2013-12-30

How to Cite

Babadzhanov P.B., Kokhirova G.I., Khamroev U.Kh. The Capricornids asteroid-meteoroid complex. Ecological Bulletin of Research Centers of the Black Sea Economic Cooperation, 2013, no. 4, pp. 20-25. (In Russian)

Copyright (c) 2013 Babadzhanov P.B., Kokhirova G.I., Khamroev U.Kh.

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