TY CONF TI Velocities-distance optimization of the rotation model of a homogeneous flat subsystem of Galactic objects: masers KW methods: data analysis; Galaxy: fundamental parameters KW kinematics and dynamics JO Modern astronomy: from the Early Universe to exoplanets and black holes AU Nikiforov, I.. AU Sobolev, P.. AU Veselova, A.. PY 2024 PB Special Astrophysical Observatory of the Russian Academy of Sciences