Infrared coronographic imaging of circumstellar material around 55 Cancri. On the right is the H filter total image, contoured with the best fit ellipse and major and minor axes overlain. The circle in the center of the image is the corongraphic mask which has a diamter of 3 arcseconds. The image is approximately 15 arcseconds on a side at a plate scale of 0.055 arcseconds per pixel.
North is up and East is to the left.
The faint vertical and horizontal lines emanating from the coronographic mask are the remnants of the diffraction patterns of the telescope spiders which are used to help register the images. The contour interval on the left is 0.83 mJy per arcsecond squared, with a lowest contour of 1.11 mJy per arcsecond squared.