Annual Parallax Distance and Secular Motion of the Water Fountain Source IRAS 18286โ0959
Annual Parallax Distance and Secular Motion of the Water Fountain Source IRAS 18286โ0959
We report on results of astrometric observations of water vapor masers in the "water fountain" source IRAS 18286-0959 (I18286) with the VLBI Exploration of Radio Astrometry (VERA). These observations yielded an annual parallax of IRAS 18286-0959, pi=0.277+/-0.041 mas, corresponding to a heliocentric distance of D=3.61(+0.63)(-0.47) kpc. The maser feature, whose โฆ