We report the results of the measurement of the trigonometric parallax of an H _ { 2 } O maser source in IRAS 22555 + 6213 with the VLBI Exploration of Radio Astrometry ( VERA ) .
The annual parallax was determined to be 0.314 \pm 0.070 mas , corresponding to a distance of 3.18 ^ { +0.90 } _ { -0.66 } kpc .
Our results confirm IRAS 22555 + 6213 to be located in the Perseus arm .
We computed the peculiar motion of IRAS 22555 + 6213 to be ( U _ { src } ,V _ { src } ,W _ { src } ) = ( 4 \pm 4 , -32 \pm 6 , 8 \pm 6 ) km s ^ { -1 } , where U _ { src } , V _ { src } , and W _ { src } are directed toward the Galactic center , in the direction of Galactic rotation and toward the Galactic north pole , respectively .
IRAS 22555 + 6213 , NGC 7538 and Cepheus A lie along the same line of sight , and are within 2 ^ { \circ } on the sky .
Their parallax distances with which we derived their absolute position in the Milky Way show that IRAS 22555 + 6213 and NGC 7538 are associated with the Perseus Arm , while Cepheus A is located in the Local Arm .
We compared the kinematic distances of IRAS 22198 + 6336 , G108.18 + 05.51 , G108.20 - 00.58 , G108.47 + 02.81 , G108.59 + 00.49 , Cepheus A , NGC 7538 , G111.23 - 01.23 , G111.25 - 00.76 and IRAS 22555 + 6213 derived with flat and non-flat rotation curve with its parallax distance and found the kinematic distance derived from the non-flat rotation assumption ( - 5 to - 39 km s ^ { -1 } lag ) to be consistent with the parallax distance .