Distribution of the 6.7 GHz methanol maser spots, as derived from the EVN (including archival data from Bartkiewicz et al. 2016), VLBA, and LBA observations at all epochs. The size of the circles is proportional to the square root of the intensity of a given spot. The symbol color corresponds to the LSR velocity, as indicated in the inserted spectra. The vertical gray lines at the spectra indicate the systemic velocity (Hirota et al. 2022). The (0,0) point in 2019 corresponds to the coordinates given in Fig. 1 and in 2009 to the coordinates RA(J2000) = 18^h35^m08^s.12683 and Dec(12000) = −7°35′03.″7868 (from the BeSSeL survey, EVLA, by Hu et al. 2016).