Q:Information: - 11573 Helmholtz ( 1993 SK3 ) is an outer main - belt asteroid discovered on September 20 , 1993 , by Freimut Borngen and Lutz D. Schmadel at Tautenburg . It is one of very few asteroids located in the 2 : 1 mean motion resonance with Jupiter . - The Minor Planet Center (MPC) is the official worldwide organization in charge of collecting observational data for minor planets (such as asteroids) and comets, calculating their orbits and publishing this information via the "Minor Planet Circulars". Under the auspices of the International Astronomical Union, it operates at the Smithsonian Astrophysical Observatory, which is part of the Center for Astrophysics along with the Harvard College Observatory. - Tautenburg is a municipality in the district Saale-Holzland, in Thuringia, Germany. It is home to the Karl Schwarzschild Observatory. - The Karl Schwarzschild Observatory is a German astronomical observatory in Tautenburg near Jena, Thuringia. - Freimut Borngen (born October 17, 1930) is a German astronomer and a prolific discoverer of minor planets. A few sources give his first name wrongly as "Freimuth". The Minor Planet Center credits him as F. Borngen. Given the information above, choose from the list below the object entity that exhibits the relation 'site of astronomical discovery' with the subject '11573 helmholtz'. Choices: - harvard college observatory - karl schwarzschild observatory
A:
karl schwarzschild observatory