Abstract:
The maximum-likelihood analysis is applied to space velocities of 113 classical Cepheids with periods longer than 9 days, 89 young open clusters with ages less than 40 Myr, 102 blue supergiants, 200 HII-regions and 150 HI radial velocities. We used the distance scales of objects balanced by the statistical-parallax technique. The kinematic properties of young subsystems have been derived (solar motion components, velocity-ellipsoid axes). The rotation curve is constructed from radial velocities of all objects on the galactocentric distances 2-14 kpc for short (R₀=7.5kpc) and long (R₀=8.5kpc) distance scale.

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