Distribution of the orbital planes of IRS 5, IRS 1W, IRS 21, IRS 10W, and IRS 16CC. The 1σ and 2σ confidence levels are shown in red and blue. The ellipses represent the 1σ position of the CCW, CCWS, and the NA orbital planes: the NA is represented by the light-blue ellipse (Paumard et al. 2006; Bartko et al. 2009); the green ellipse corresponds to the CWS according to Lu et al. (2009); the red, pink, and orange ellipses display the CWS according to Bartko et al. (2009) for stars at 0.8′′–12′′, 0.8′′–3.5′′, and 7′′–12′′ projected distances, respectively; the purple star represents the position of the CWS for stars at 3.5′′–7′′ projected distance from Sgr A* (Bartko et al. 2009), and the blue ellipse displays the position of the CCWS according to Paumard et al. (2006).