Left panel: ¹²CO(3–2) line detected toward R Aqr with ALMA. The line is generated from channel maps with 1 km s⁻¹ spectral resolution and measured across a 3′′ aperture centered on the continuum emission peak. Middle panel: line emission from the lines listed in Table 2. All lines (including ¹²CO(3–2)) are generated at one pixel coincident with the continuum emission peak, and at 2 km s⁻¹ spectral resolution. Right panel: orbits of the binary pair as derived by Gromadzki & Mikołajewska (2009). Both the Mira star (+) and the hot component (×) move anticlockwise in this representation, and the center of mass is marked by the solid dot. The axes unit is the system semimajor axis, a (~15.5 AU according to Gromadzki & Mikołajewska 2009). For details see Gromadzki & Mikołajewska (2009). The position of the stars at the latest periastron passage (green stars) and the time of the ALMA observations (red stars) have been added. The base of the thick arrows marks the times of maximum velocity approach and retreat of the Mira star from the observer.