NOVELTY - Tracking device (1) comprises (i) a receiving structure (12), which is adjusted around at least one axis for mounting at least one optical or other electromagnetic waves sensitive element, preferably a solar panel or reflector telescope, (ii) at least one rotational drive per axis, (iii) a first connection element (19), (iv) a second connection element comprising at least one planar connection surface, (iv) at least one row of roller elements, (v) a toothing, which extends at least partially around one connection element, and (vi) an annularly arranged distributed boreholes.    USE - Used as a tracking device.    DETAILED DESCRIPTION - Tracking device (1) comprises (i) a receiving structure (12), which is adjusted around at least one axis for mounting at least one optical or other electromagnetic waves sensitive element, preferably a solar panel or reflector telescope with an optical or preferential radiation direction, (ii) at least one rotational drive per axis for actively and rotationally adjusting the receiving structure for tracking a celestial body on one or multiple axes of the mounted element using a control system according to a predetermined algorithm, (iii) a first connection element (19) comprising at least one planar connection surface for stationary fixing to a base, a socket, a column or a connection element of another pivoting unit (10), (iv) a second connection element comprising at least one planar connection surface for rotationally fixed coupling to the receiving structure or to the connection element of another pivoting unit, (iv) at least one row of roller elements, which is provided between the concentric annular connection elements of the pivoting unit, (v) a toothing, which extends at least partially around one connection element and is formed together with the track by processing or molding a common annular base body, and (vi) an annularly arranged distributed boreholes, which are provided on other connection element, for mounting on a plant part. The rotational drive is designed center free. The rotational drive comprises two annular connection elements, which are mounted one upon the other, and are coupled to at least one motor for mutual relative adjustment. The roller element rolls along the track on the first and second connection elements. The boreholes are formed together with the local carrier by processing or molding the common annular base body.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of the tracking device.    Tracking device (1)    Pivoting unit (10)    Receiving structure (12)    Support structure (13)    Connecting element (19)