The images on this website have been optimized for viewing over the internet, in terms of image size and file size. Most color photographs are stored in JPEG format, allowing for true color and fast downloads. Many of the CCD images of asteroids and comets are stored in GIF format, to better represent the quality of the original. Our images of asteroids appear 'grainy' because the image displayed is only a small, magnified cropping from the original CCD image. They were magnified to make the asteroid's movement easier to see, but no pixel information was lost. So the images of asteroids on the web page are as high resolution as they can get.