The Bureau des longitudes is an academy responsible of the definition of the French National Ephemerides. The making of these ephemerides is entrusted to the Institut de mecanique celeste et de calcul des ephemerides, IMCCE, which has the form of an institute linked to Paris Observatory.
Created by the law of the messidor 7, year 3 by the Convention Nationale, the Bureau des longitudes received various missions which changed during years and are currently described by the decree of January 30, 1970. The Bureau des longitude has the responsibility of the missions which it entrusts to the Institut de mecanique celeste et de calcul des éphémérides (IMCCE).
The Bureau des longitudes meet once per month. It publishes the cahiers des sciences de l'univers and organizes scientific public open talks.
Since 1991, the Bureau des longitudes publishes "les cahiers des sciences de l'univers" which includes the following titles :
The Bureau des longitudes has published during long years a directory with an encyclopaedic part; since 1977, the directory contained only annual astronomical data and the encyclopaedic part was published in the form of an encyclopeadia du Bureau des longitudes which includes the following titles :
Conferences are proposed every first Tuesday of the month. They take place at the 23 quai Conti, Paris 6th, Hugo room and are public opened.
The academy of the Bureau meets once per month. Informations about the meetings are only available for the members of the Bureau des longitudes. Only past meetings reports are accessible to the historians.
Here is the text founder of the Bureau des longitudes (law of the messidor 7, year 3 by the Convention Nationale) and here are informations about the history of the Bureau des longitudes..
Laws and decrees of The Bureau des longitudes remains in restricted access.
Click on the Web site of the Bureau des longitudes to obtain the public open conferences, titles, dates and the organized events.
By decree of June 2, 1998, the Bureau des longitudes missions' such as the directories publication, astronomical tables, astronomical data useful to the life of the nation are entrusted to the Institut de mechanique céleste et de calcul des éphémérides which succeeded its calculations service. All informations, missions and research activities are available on this website