CME seen from COR 1 on board STEREO A (left), STEREO B (middle), and LASCO C2 on board SOHO (right) at 01:30 UT. The black plus symbol denotes the centroid of the CME, which is derived from a red dot ellipse by applying the curve fitting method. The yellow plus and the green diamond symbols are the CME leading edge and CME-streamer interaction point determined by eye-detection, respectively. Here and in the following figures the circle indicates the size and position of the limb of the visible sun.