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.

About the authors

D. S. Zimnukhov

Sternberg Astronomical Institute

Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991

V. M. Lipunov

Sternberg Astronomical Institute; Faculty of Physics

Author for correspondence.
Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991; Moscow, 119234

E. S. Gorbovskoy

Sternberg Astronomical Institute

Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991

V. G. Kornilov

Sternberg Astronomical Institute; Faculty of Physics

Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991; Moscow, 119234

N. V. Tyurina

Sternberg Astronomical Institute

Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991

V. V. Chazov

Sternberg Astronomical Institute

Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991

A. V. Gabovich

Sternberg Astronomical Institute; Blagoveshchensk State Pedagogical University

Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991; Blagoveshchensk, 675000

P. V. Balanutsa

Sternberg Astronomical Institute; Faculty of Physics

Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991; Moscow, 119234

V. V. Vladimirov

Sternberg Astronomical Institute

Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991

O. A. Gress

Sternberg Astronomical Institute; Institute of Applied Physics

Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991; Irkutsk, 664003

A. S. Kuznetsov

Sternberg Astronomical Institute

Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991

R. Rebolo Lopez

Instituto de Astrofisica de Canarias

Email: victor@sai.msu.ru
Spain, La Laguna, Tenerife

M. Serra-Ricart

Instituto de Astrofisica de Canarias

Email: victor@sai.msu.ru
Spain, La Laguna, Tenerife

V. V. Yurkov

Blagoveshchensk State Pedagogical University

Email: victor@sai.msu.ru
Russian Federation, Blagoveshchensk, 675000

D. M. Vlasenko

Sternberg Astronomical Institute; Faculty of Physics

Email: victor@sai.msu.ru
Russian Federation, Moscow, 119991; Moscow, 119234

N. M. Budnev

Institute of Applied Physics

Email: victor@sai.msu.ru
Russian Federation, Irkutsk, 664003

Yu. P. Sergienko

Blagoveshchensk State Pedagogical University

Email: victor@sai.msu.ru
Russian Federation, Blagoveshchensk, 675000

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