Omissions? The formula for angular diameter is Angular Diameter = 206265 X (Actual diameter / Distance) The 206,265 is a conversion factor to make sure the angular diameter comes out in seconds of arc. It is the capacity of an image-forming device such as an optical or radio telescope, a microscope, a camera, or an eye, to separate two objects located at a small angular distance. So, the angular resolution during the day is 0.02, according to the Angular Resolution Calculator. Light passing through the lens interferes with itself creating a ring-shape diffraction pattern, known as the Airy pattern, if the wavefront of the transmitted light is taken to be spherical or plane over the exit aperture. This website uses cookies to improve your experience while you navigate through the website. A single optical telescope may have an angular resolution less than one arcsecond, but astronomical seeing and other atmospheric effects make attaining this very hard. Point-like sources separated by an angle smaller than the angular resolution cannot be resolved. We can use this formula to estimate the angular resolution of the Hubble Space Telescope. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. n We also use third-party cookies that help us analyze and understand how you use this website. window.jQuery || document.write('