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Stars outside the Hipparcos list closely encountering the Solar system

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Abstract

Based on currently available kinematic data, we have searched for stars outside the Hipparcos list that either closely encountered in the past or will encounter in the future the Solar system within several parsecs. For the first time, we have identified two single stars, GJ 3379 (G 099-049) and GJ 3323 (LHS 1723), as candidate for a close encounter with the solar orbit. The star GJ 3379 could encounter the Sunmore closely to aminimumdistance d min = 1.32±0.03 pc at time t min = −163 ± 3 thousand years. We have found two potential candidates for a close encounter that have only photometrical distances: the white dwarf SSSPM J1549-3544 without any data on its radial velocity and the L-dwarf SDSS J1416+1348. The probabilities of their penetration into the Oort cloud region are 0.09 (at a model radial velocity <V r < = 50 km s−1) and 0.05, respectively.

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Authors and Affiliations

  1. Pulkovo Astronomical Observatory, Russian Academy of Sciences, Pulkovskoe sh. 65, St. Petersburg, 196140, Russia

    V. V. Bobylev

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  1. V. V. Bobylev
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Correspondence to V. V. Bobylev.

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Original Russian Text © V.V. Bobylev, 2010, published in Pis’ma v Astronomicheskiĭ Zhurnal, 2010, Vol. 36, No. 11, pp. 862–868.

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Bobylev, V.V. Stars outside the Hipparcos list closely encountering the Solar system. Astron. Lett. 36, 816–822 (2010). https://doi.org/10.1134/S1063773710110071

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