Institut de Mécanique Céleste et de Calcul des Éphémérides

The fields where it stands highest, over all time, ranked among every institution above the floor in each field.

Each strip is that field’s whole ranked pool, with the notch where Institut de Mécanique Céleste et de Calcul des Éphémérides sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no world mark, because the world rate differs by field (from about 6% to 21% in this record).

Where its research is concentrated relative to its size: Physics and Astronomy takes 25.4× the share of its output that it takes of world research.

1. Physics and AstronomyField · 24.0 works25×

Location quotient, a volume reading rather than an impact one. It surfaces small, lopsided specialities.

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

• Physics and Astronomy 25.4×
• Earth and Planetary Sciences 6.7×
• Mathematics 4.7×
• Biochemistry, Genetics and Molecular Biology 0.6×
• Engineering 0.6×
• Decision Sciences 0.6×
• Social Sciences 0.5×
• Environmental Science 0.5×
• Computer Science 0.4×
• Health Professions 0.3×
• Chemistry 0.2×
• Business, Management and Accounting 0.2×
• Economics, Econometrics and Finance 0.1×
• Agricultural and Biological Sciences 0.1×
• Arts and Humanities 0.1×
• Materials Science 0.0×

Ranked on the composite score, A. Fienga, J. Laskar and A. C. M. Correia lead among researchers whose main affiliation is Institut de Mécanique Céleste et de Calcul des Éphémérides.

1. 1 🇫🇷 A. Fienga France · #50,321 worldwide 278 citations · 53 works
2. 2 🇫🇷 J. Laskar France · #80,712 worldwide 708 citations · 135 works
3. 3 🇫🇷 A. C. M. Correia France · #246,241 worldwide 252 citations · 72 works
4. 4 🇫🇷 Alain Chenciner France · #263,469 worldwide 101 citations · 30 works
5. 5 🇫🇷 Nicolas Rambaux France · #266,865 worldwide 228 citations · 62 works
6. 6 🇫🇷 B. Carry France · #279,832 worldwide 526 citations · 151 works
7. 7 🇫🇷 R. Behrend France · #282,488 worldwide 104 citations · 31 works
8. 8 🇫🇷 Sylvain Bouley France · #301,807 worldwide 63 citations · 48 works
9. 9 🇫🇷 Pascal Descamps France · #313,895 worldwide 78 citations · 73 works
10. 10 🇫🇷 J. L. Simon France · #333,499 worldwide 44 citations · 20 works

By fractional works in 2022–2025, weighted toward what it does more of than the world: Solar System Abundances, Terrestrial Planets, Exoplanets, Stellar Astrophysics, Mars, Martian Surface, Climate Change and Dynamical Systems.

By volume in 2022–2025: Astro and Planetary Science, Stellar, planetary, and galactic studies, Planetary Science and Exploration and Quantum chaos and dynamical systems.

1. 1 Astro and Planetary Science Astronomy and Astrophysics 8 works
2. 2 Stellar, planetary, and galactic studies Astronomy and Astrophysics 4 works
3. 3 Planetary Science and Exploration Astronomy and Astrophysics 3 works
4. 4 Quantum chaos and dynamical systems Statistical and Nonlinear Physics 2 works
5. 5 Geology and Paleoclimatology Research Atmospheric Science 2 works
6. 6 Geophysics and Gravity Measurements Oceanography 1 works
7. 7 Geomagnetism and Paleomagnetism Studies Molecular Biology 1 works
8. 8 Astrophysics and Star Formation Studies Astronomy and Astrophysics 1 works
9. 9 Regional Development and Policy Political Science and International Relations 1 works
10. 10 Scientific Research and Discoveries Statistical and Nonlinear Physics 1 works

Against the world’s own shares — the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

Output in 2018–2022 was 35% lower than in 2013–2017.

• Centre National de la Recherche Scientifique
• Inserm
• Sorbonne Université
• Université Paris Cité
• Commissariat à l'Énergie Atomique et aux Énergies Alternatives
• Université Paris 1 Panthéon-Sorbonne
• Institut Pasteur
• Assistance Publique – Hôpitaux de Paris