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The MASTER Global Robotic Telescope Network: Observations of Asteroid NEA 2015 TB145

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Abstract

The results of white-light photometry for a uniquely long series of data (13.5 hours of observations, 1124 measurements) for the Near-Earth Asteroid (NEA) 2015 TB145 are presented. These data were obtained with the MASTER-Amur and MASTER-Tavrida wide-field robotic telescopes of the Mobile Astronomical System of Telescope-Robots (MASTER) global network of Lomonosov Moscow State University, located in the Crimea and in Blagoveshchensk. The object moved by more than 120° during the observations. The asteroid passed the point of closest approach to the Earth, i.e., observations were carried during both the asteroid's approach and recession. Thus, due to the geometry of the passage, this series of observations contains information about the asteroid viewed at different angles, and is very suitable for precisely determining the shape of the object. Mathematical modeling of the light curve and astrometric positions (with the Asteroids3D code) was carried out, and the probable shape of the asteroid (conical) and the rotation period of 5.9 hours were obtained, as well as the orientation of the rotation axis in ecliptic coordinates: longitude λ = 53°, latitude β = −20°. The derived period coincides with twice the period of 2.9 hours obtained by other observers published earlier, within the uncertainties.

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Acknowledgments

We thank the referee for a number of comments that enabled us to significantly improve this paper.

Funding

The MASTER global network of robotic telescopes is supported by the Development Program of Lomonosov Moscow State University and the Moscow Union OPTICA (equipment). This work was supported by the Russian Foundation for Basic Research (project 17-52-80133).

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Authors and Affiliations

  1. Sternberg Astronomical Institute, Lomonosov Moscow State University, Moscow, 119991, Russia

    D. S. Zimnukhov, V. M. Lipunov, E. S. Gorbovskoy, V. G. Kornilov, N. V. Tyurina, V. V. Chazov, A. V. Gabovich, P. V. Balanutsa, V. V. Vladimirov, O. A. Gress, A. S. Kuznetsov & D. M. Vlasenko

  2. Faculty of Physics, Moscow State University, Moscow, 119234, Russia

    V. M. Lipunov, V. G. Kornilov, P. V. Balanutsa & D. M. Vlasenko

  3. Blagoveshchensk State Pedagogical University, Blagoveshchensk, 675000, Russia

    A. V. Gabovich, V. V. Yurkov & Yu. P. Sergienko

  4. Institute of Applied Physics, Irkutsk State University, Irkutsk, 664003, Russia

    O. A. Gress & N. M. Budnev

  5. Instituto de Astrofisica de Canarias, La Laguna, Tenerife, Spain

    R. Rebolo Lopez & M. Serra-Ricart

Authors
  1. D. S. Zimnukhov
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  2. V. M. Lipunov
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  3. E. S. Gorbovskoy
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  4. V. G. Kornilov
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  5. N. V. Tyurina
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  6. V. V. Chazov
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  7. A. V. Gabovich
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  8. P. V. Balanutsa
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  9. V. V. Vladimirov
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  10. O. A. Gress
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  11. A. S. Kuznetsov
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  12. R. Rebolo Lopez
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  13. M. Serra-Ricart
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  14. V. V. Yurkov
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  15. D. M. Vlasenko
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  16. N. M. Budnev
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  17. Yu. P. Sergienko
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Corresponding author

Correspondence to V. M. Lipunov.

Additional information

Russian Text © The Author(s), 2019, published in Astronomicheskii Zhurnal, 2019, Vol. 96, No. 12, pp. 1031-1044.

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Zimnukhov, D.S., Lipunov, V.M., Gorbovskoy, E.S. et al. The MASTER Global Robotic Telescope Network: Observations of Asteroid NEA 2015 TB145. Astron. Rep. 63, 1056–1068 (2019). https://doi.org/10.1134/S1063772919120096

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  • DOI: https://doi.org/10.1134/S1063772919120096

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