Information:  - Palomar Observatory is an astronomical observatory located in San Diego County, California, United States, southeast of Los Angeles, California, in the Palomar Mountain Range. It is owned and operated by the California Institute of Technology (Caltech) located in Pasadena, California. Research time is granted to Caltech and its research partners, which include the Jet Propulsion Laboratory (JPL) and Cornell University.  - Caliban ( / kælbæn / KAL - i - ban or / kælbn / KAL -  - bn ) is the second - largest retrograde irregular satellite of Uranus . It was discovered on 6 September 1997 by Brett J. Gladman , Philip D. Nicholson , Joseph A. Burns , and John J. Kavelaars using the 200 - inch Hale telescope together with Sycorax and given the temporary designation S / 1997 U 1 . Designated Uranus XVI , it was named after the monster character in William Shakespeare 's play The Tempest .  - George Ellery Hale (June 29, 1868  February 21, 1938) was an American solar astronomer, best known for his discovery of magnetic fields in sunspots, and as the leader or key figure in the planning or construction of several world-leading telescopes; namely, the 40-inch refracting telescope at Yerkes Observatory, 60-inch Hale reflecting telescope at Mount Wilson Observatory, 100-inch Hooker reflecting telescope at Mount Wilson, and the 200-inch Hale reflecting telescope at Palomar Observatory.  - The Hale Telescope is a , 3.3 reflecting telescope at the Palomar Observatory in California, US, named after astronomer George Ellery Hale. With funding from the Rockefeller Foundation, he orchestrated the planning, design, and construction of the observatory, but did not live to see its commissioning. The "Hale" was groundbreaking for its time, with double the diameter of the next largest telescope and pioneering the use of many technologies such as vapor deposited aluminum and low thermal expansion glass. It is still in active use.    Given the information above, choose from the list below the object entity that exhibits the relation 'site of astronomical discovery' with the subject 'caliban '.  Choices: - palomar observatory  - yerkes observatory
A:
palomar observatory