The distance and size of the red hypergiant NML Cygni from VLBA and VLA astrometry
The distance and size of the red hypergiant NML Cygni from VLBA and VLA astrometry
We have measured the annual parallax and proper motion of NML Cyg from multiple epoch VLBA observations of the circulstellar H2O and SiO masers. The measured parallax of NML Cyg is 0.620+/-0.047 mas, corresponding to a distance of 1.61+/-0.12 kpc. The measured proper motion of NML Cyg is mu_x = …