X-ray (ROSAT PSPC, 0.1–2.4 keV, red) and optical (STScI DSS2 red, green) composite image of IC 443. Left: Geometrical center of the SNR (black cross) and the runaway star search region in Dinçel et al. (2024b) (surrounding black circle). A blue cross indicates the position of HD 254577, while a blue circle indicates that of the NS. The green box is the border of the image on the right. Right: Close-up image of the same. The big green circle represents a region with a radius of 10 pc, hosting a possible stellar group, while the small green circle shows a smaller, more compact group with a 1.5 pc radius. A 100 kyr magnified proper motion vector of HD 254577 is shown with a green arrow.