Joseph Lepaute Dagelet

Joseph Lepaute Dagelet , born with Thonne-the-Length the November 25th 1751 and died in Vanikoro in May 1788, is an astronomer, clock and watch maker and scientist French, member of the Expédition of Lapérouse (1785 - 1788).

Biography

Nephew of the clock and watch makers of the king, manufacturers of the marine chronometers, it arrives at Paris in 1767, where it is accommodated by his uncles, Jean-Andre and Jean-Baptiste Lepaute. It is in contact with his/her aunt, the wife of Jean-Andre, Nicole-Queen Lepaute, which he discovers astronomy, between 1767 and 1772. During five years, Dagelet works at the observatory of the Collège Mazarin, where he becomes the assiduous pupil of Joseph Jerome Lefrançois de Lalande.

In 1773, it leaves for the southern Lands with Yves Joseph de Kerguelen de Trémarec. It is rewarded for its zeal during the voyage by a load of mathematics professor to the Military academy of Paris in 1777.

It is known in particular to have calculated the distance between the center of the planet Mercure with the Sun, to have drawn up the chart of the eclipse of 1778, to have discovered a nova magnitude 6 appeared in the constellation of Sagittarius (July 27th, 28th and 29th 1783) and to have been one of the scientists chosen to observe the second voyage in balloon of Jacques Alexandre César Charles with the Champ de Mars on August 27th 1783.

It presents in 1780 with observations on planets and stars to the Academy of Science, where it is named associated, then associated astronomer in 1785. In 1783, it publishes memories on the Aphélie of Venus (not of the orbit furthest away from the sun) and over the length of the year. In 1785, it takes part in the forwarding of Jean-François de Lapérouse and leaves the life there.

External bonds

Genealogy: sites Geneanet samlap and Geneanet esil1

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