Earth, Moon, and Planets

, Volume 72, Issue 1–3, pp 19–23

Encounters of the Sun with nearby stars in the past and future

  • A.A. Mülläri
  • V.V. Orlov
Article

Abstract

The relative space motions of the Sun and nearby stars are considered. The coordinates and velocities of the stars are taken from the Catalogue of Nearby Stars by Gliese and Jahreiss (1991). The minimum space separation between the Sun and every star as well as the corresponding moment of time are calculated by two ways. Firstly, the straight line motions are considered. Secondly, the effect of the Galaxy potential is taken into account. The Galaxy model proposed by Kutuzov and Ossipkov (1989) is used. Twenty five stars approaching the Sun closer than two parsecs are selected. The effects of the uncertainties in the observational data are studied. The influence of the encounters to the Oort cloud is discussed.

Key words

Solar neighbourhood Oort comet cloud 

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References

  1. Allen, C.W.: 1973, Astrophysical quantities, The Athlone Press, London.Google Scholar
  2. Gliese, W.: 1969, Veröffent. Astron.-Rechen. Institut Heidelberg 3, No. 22.Google Scholar
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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • A.A. Mülläri
    • 1
  • V.V. Orlov
    • 2
  1. 1.Department of MathematicsPetrozavodsk State UniversityPetrozavodskRussia
  2. 2.Astronomical Institute, St. Petersburg State UniversitySt. Petersburg PeterhofRussia

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