Right ascension parallax fits of G012.81−0.19 (left), G012.90−0.24 (middle), and G012.90−0.26 (right), yielding absolute parallaxes of 0.343 ± 0.037 mas, 0.408 ± 0.025 mas, and 0.396 ± 0.032 mas, respectively. The positions of the maser spots were measured relative to the water maser G012.68−0.18 and consecutively to the two background quasars J1808−1822 (blue) and J1825−1718 (red). Left panel: positions of the maser spots at 34.1 (triangles) and −1.4 (squares) km s^-1. Middle panel: positions of the maser spots at 34.5 (triangles), 34.9 (squares), and 35.3 (pentagons) km s^-1. Right panel: positions of the maser spot at 37.0 (triangles) km s^-1.