Estimation of the solar galactocentric distance and galactic rotation velocity from near-solar-circle objects.

We have tested the method of determining the solar Galactocentric distance R and Galactic rotation velocity V modified by Sofue et al. using near-solar-circle objects. The motion of objects relative to the local standard of rest has been properly taken into account. We show that when such young objects as star-forming regions or Cepheids are analyzed, allowance for the perturbations produced by the Galactic spiral density wave improves the statistical significance of the estimates. The estimate of R = 7.25 ± 0.32 kpc has been obtained from 19 star-forming regions. The following estimates have been obtained from a sample of 14 Cepheids (with pulsation periods P > 5): R = 7.66 ± 0.36 kpc and V = 267 ± 17 km s. We consider the influence of the adopted Oort constant A and the character of stellar proper motions (Hipparcos or UCAC4). The following estimates have been obtained from a sample of 18 Cepheids with stellar proper motions from the UCAC4 catalog: R = 7.64 ± 0.32 kpc and V = 217 ± 11 km s. [ABSTRACT FROM AUTHOR]