Werner Landgraf
He also developed a method of eliminating systematic errors in positioning brighter comets that resulted in a more accurate prediction of the Halley's Comet. A recalculation of the path of Halley's comet to 2317 BC confirmed that the Greeks had already seen the comet on 466 B.C.
He discovered seven minor planets including 3683 Baumann, 4378 Voigt (named after Hans-Heinrich Voigt), 9938 Kretlow and 4349 Tibúrcio at ESO's La Silla Observatory in northern Chile.
Historical comet observations in China
Ancient Chinese records of comet observations are the most extensive historical records in existence. They are far more complete than European observations. The earliest confirmed Chinese comet observation is from 613 BC, but there is also a possible sighting of Halley's Comet in 1059 BC. However, this may not be an actual sighting, but the result of later back calculation.