Vol. 55, No. 3, 2021

Solar System Research

Topographic Features of the Lunar Maria and Basins

Zh. F. Rodionova, A. Yu. Zharkova, E. A. Grishakina and V. V. Shevchenko p. 183 abstract

The Mass Distribution of Transit Exoplanets from the Mass–Radius Relationships: the Structurization within Planetary Systems

O. Ya. Yakovlev, A. E. Ivanova, V. I. Ananyeva, I. A. Shashkova, A. V. Yudaev, J.-L. Bertaux and A. V. Tavrov p. 200 abstract

Fast Calculation of Magnetic Coordinates Using Artificial Neural Network in Jupiter’s Magnetosphere

Jian-zhao Wang, Ji-nan Ma, Xiao-yu Jia, Dai Tian, Ao-song Zhou and Zhuo-xi Huo p. 218 abstract

Simulation of the Structure of Dust Fractal Clusters in Protoplanetary Gas–Dust Disks

A. V. Rusol p. 227 abstract

Modeling the Fragmentation of Dust–Ice Clusters at the Snow Line in Protoplanetary Disks

M. Ya. Marov, A. V. Rusol and A. B. Makalkin p. 238 abstract

On the Characteristics of Singular Trajectories of the Asteroid Apophis and the Possibility of Deflecting It to Avoid Collisions with the Earth

L. L. Sokolov, G. A. Kuteeva, N. A. Petrov, B. B. Eskin, I. A. Balyaev and A. A. Vasil’ev p. 259 abstract

Secular Resonances in the Dynamics of Objects Moving in LEO–MEO Regions of Near-Earth Orbital Space

A. G. Aleksandrova, E. V. Blinkova, T. V. Bordovitsyna, N. A. Popandopulo and I. V. Tomilova p. 266 abstract

Erratum to: Geological and Geomorphological Characteristics of High-Priority Landing Sites for the Luna-Glob Mission

S. S. Krasilnikov, A. T. Basilevsky, M. A. Ivanov and A. S. Krasilnikov p. 282 abstract

Erratum to: Numerical-Analytical Study of Linked Orbits in the Restricted Elliptic Doubly Averaged Three-Body Problem

M. A. Vashkov’yak p. 283 abstract