September 9, 2010 - Astronomy.com
Amateur astronomers using backyard telescopes were the first to detect two small objects that burned up in Jupiter's atmosphere June 3 and August 20.
...
...Professional astronomers, alerted by e-mail, looked for signs of the impact in images from larger telescopes, including NASA's Hubble Space Telescope, the European Southern Observatory's Very Large Telescope in Chile, and Gemini Observatory telescopes in Hawaii and Chile. Scientists saw no thermal disruptions or typical chemical signatures of debris, which allowed them to put a limit on the size of the object.
...