Encounters of the Sun with Nearby Stars in the Past and Future

  • A. A. Mülläri
  • V. V. Orlov
Conference paper


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 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Allen, C.W. 1973, Astrophysical quantities, The Athlone Press, LondonGoogle Scholar
  2. Gliese, W.: 1969, Veröffent. Astron.-Rechen. Institut Heidelberg 3, No. 22.Google Scholar
  3. Gliese, W., Jahreiss, H.: 1991, Unpublished.Google Scholar
  4. Kutuzov, S.A., Ossipkov, L.P. 1989, Sov. Astron., 66, 965.Google Scholar
  5. Matthews, R.A.J. 1994, Q. J. R. astr. Soc., 35, 1.ADSGoogle Scholar
  6. Revina, I.A. 1988, Analysis of motion of celestial bodies and estimation of accuracy of their observations, Latvian University, Riga, p. 121Google Scholar

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 InstituteSt. Petersburg State UniversitySt. Petersburg PeterhofRussia

Personalised recommendations