Johann Evangelist Helfenzrieder (December 9, 1724 - March 1803)
Johann Evangelist Helfenzrieder was born in Landsberg am Lech, Bavaria,
Germany. Reportedly, he was a Jesuit, a doctor of divinity, and lecturer
of mathematics in Ingolstadt, and from 1770 - 1781, professor for
Helfenzrieder discovered comet 1766 Helfenzrieder (D/1766 G1, 1766 II)
from Dillingen, Germany in the evening of April 1, 1766.
This comet was later independently rediscovered by
Charles Messier in the evening of April 8 of
Comet Helfenzrieder was computed to have an orbital period of
about 4 1/2 years, but was never seen again.
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