Observatory of Geneva
Encyclopedia
Observatoire de Genève (in German Observatorium von Genf, in English Observatory of Geneva) is an astronomical observatory at Sauverny in the municipality of Versoix
, Canton of Geneva
, Switzerland
. It has been active in discovering exoplanets, in stellar photometry, stellar evolution models, and has been involved in the European Space Agency
missions: Hipparcos
, INTEGRAL, Gaia and Planck.
It operates the 1.2m Leonhard Euler Telescope
at La Silla.
In cooperation with University of Liège
it supports TRAPPIST
, a 0.6 m telescope that aided in showing that Eris may be smaller than Pluto in 2010. The program also observes comets and hunts exoplanets.
, the Neuchatel Observatory
, Geneva Observatory Besancon Observatory and Kew Observatory
were examples of prominent observatories that tested timepiece movements for accuracy. The testing process lasted for many days, typically 45 days. Each movement was tested in 5 positions and 2 temperatures, in 10 series of 4 or 5 days each. The tolerances for error were much finer than any other standard, including the modern COSC
standard. Movements that passed the stringent tests were issued a certification from the observatory called a Bulletin de Marche, signed by the Directeur of the Observatory. The Bulletin de Marche stated the testing criteria, and the actual performance of the movement. A movement with a Bulletin de Marche from an observatory became known as an Observatory Chronometer
, and such were issued a chronometer reference number by the Observatory.
The role of the observatories in assessing the accuracy of mechanical timepieces was instrumental in driving the mechanical watchmaking industry toward higher and higher levels of accuracy. As a result, today high quality mechanical watch movements have an extremely high degree of accuracy. However, no mechanical movement could ultimately compare to the accuracy of the quartz movements being developed. Accordingly, such chronometer certification ceased in the late 1960's and early 1970's with the advent of the quartz watch movement.
Versoix
Versoix is a municipality in the Canton of Geneva, Switzerland, which sits on the right bank of Lac Léman. It is the last town of the Canton of Geneva on the road northeast towards Lausanne, before the Canton of Vaud starts. It is a train stop on the SBB-CFF-FFS railway line running between...
, Canton of Geneva
Canton of Geneva
The Republic and Canton of Geneva is the French speaking westernmost canton or state of Switzerland, surrounded on almost all sides by France. As is the case in several other Swiss cantons The Republic and Canton of Geneva is the French speaking westernmost canton or state of Switzerland,...
, Switzerland
Switzerland
Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....
. It has been active in discovering exoplanets, in stellar photometry, stellar evolution models, and has been involved in the European Space Agency
European Space Agency
The European Space Agency , established in 1975, is an intergovernmental organisation dedicated to the exploration of space, currently with 18 member states...
missions: Hipparcos
Hipparcos
Hipparcos was a scientific mission of the European Space Agency , launched in 1989 and operated between 1989 and 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky...
, INTEGRAL, Gaia and Planck.
It operates the 1.2m Leonhard Euler Telescope
Leonhard Euler Telescope
Leonhard Euler Telescope, or Swiss 1.2-m Leonhard Euler Telescope, is a diameter aperture reflecting telescope at the Geneva Observatory at La Silla Observatory. It is use for astronomy, and runs the CORALIE echelle spectrograph to search for planets. Its first planet discovery was of one in orbit...
at La Silla.
In cooperation with University of Liège
University of Liège
The University of Liège , in Liège, Wallonia, Belgium, is a major public university in the French Community of Belgium. Its official language is French.-History:...
it supports TRAPPIST
TRAPPIST
TRAPPIST is Belgian robotic telescope in Chile which came online in 2010, and is an acronym for TRAnsiting Planets and PlanetesImals Small Telescope, so named in homage to Trappist beer produced in the Belgian region. Situated high in the Chilean mountains at La Silla Observatory, it is actually...
, a 0.6 m telescope that aided in showing that Eris may be smaller than Pluto in 2010. The program also observes comets and hunts exoplanets.
History
In the past, the Geneva Observatory participated in assessing and rating Swiss timepiece movements for accuracy. As marine navigation adopted the usage of mechanical timepieces for navigational aid, the accuracy of such timepieces became more critical. From this need developed an accuracy testing regime involving various astronomical observatories. In EuropeEurope
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...
, the Neuchatel Observatory
Neuchâtel Observatory
The Observatoire Cantonal de Neuchâtel is an astronomical observatory funded by the Public Economy Department of the Neuchâtel State . It is located in Neuchâtel and was founded in 1858. Besides astronomical observations, the Neuchâtel observatory also works with atomic clocks...
, Geneva Observatory Besancon Observatory and Kew Observatory
Kew Observatory
Kew Observatory was an astronomical and terrestrial magnetic observatoryfounded by King George III , located within the Old Deer Park of the former Richmond Palace in Richmond, Surrey, now within Greater London. The former royal manor of Kew lies to the immediate north...
were examples of prominent observatories that tested timepiece movements for accuracy. The testing process lasted for many days, typically 45 days. Each movement was tested in 5 positions and 2 temperatures, in 10 series of 4 or 5 days each. The tolerances for error were much finer than any other standard, including the modern COSC
COSC
COSC aka C.O.S.C. is Contrôle Officiel Suisse des Chronomètres, the Official Swiss Chronometer Testing Institute, which is the institute responsible for certifying the accuracy and precision of wristwatches in Switzerland.-Background:...
standard. Movements that passed the stringent tests were issued a certification from the observatory called a Bulletin de Marche, signed by the Directeur of the Observatory. The Bulletin de Marche stated the testing criteria, and the actual performance of the movement. A movement with a Bulletin de Marche from an observatory became known as an Observatory Chronometer
Observatory Chronometer
In the world of mechanical timepieces, accuracy is paramount. In the times before electronics, mechanical timepieces called marine chronometers were developed to a very high degree of accuracy and used for maritime navigation...
, and such were issued a chronometer reference number by the Observatory.
The role of the observatories in assessing the accuracy of mechanical timepieces was instrumental in driving the mechanical watchmaking industry toward higher and higher levels of accuracy. As a result, today high quality mechanical watch movements have an extremely high degree of accuracy. However, no mechanical movement could ultimately compare to the accuracy of the quartz movements being developed. Accordingly, such chronometer certification ceased in the late 1960's and early 1970's with the advent of the quartz watch movement.