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We report trigonometric parallaxes for the sources NGC 7538 and Cep A,corresponding to distances of 2.65 [+0.12/-0.11] kpc and 0.70 [+0.04/-0.04]kpc, respectively. The distance to NGC 7538 is considerably smaller than itskinematic distance and places it in the Perseus spiral arm. The distance to CepA is also smaller than its kinematic distance and places it in the Local arm orspur. Combining the distance and proper motions with observed radial velocitiesgives the location and full space motion of the star forming regions. We findsignificant deviations from circular Galactic orbits for these sources: bothsources show large peculiar motions (> 10 km/s) counter to Galactic rotationand NGC 7538 has a comparable peculiar motion toward the Galactic center.

Trigonometric Parallaxes of Massive Star Forming Regions: II. Cep A & NGC 7538