The NAROO project

For further details, please refer to the dedicated NAROO web page.

Presentation

Old observations of the Solar System objects get a renewed high interest: they allow a better estimation of the body dynamical and physical evolutions.

Observations, in general, are necessary to build dynamical models of planets, satellites and small bodies: they are used to fit parameters in their motion. The sampling should be spread enough in time to allow the measurement of small effects which accumulate over long time spans, and which are not detectable with short-term.

While they were realized, the old observations did not benefit from accurate star catalogs, and original data were biased. Thus, it has appeared that a new astrometric reduction with current star catalogs could improve their accuracy significantly. It is necessary to find the original observation, such as the photographic plate. A new measurement with a submicrometric digitization, and a suitable treatment could be used for a new astrometric reduction using the most recent star references, while the previous ones did not allow to go back further in time than the 60’s.

This project is supported by Île-de-France (DIM ACAV), PSL Research University (PSL Explore), Paris Observatory, IPSA, PN GRAM, PNP, AF Gaia, FP7 ESPaCE.

Workshops and colloquia

• CIAS Workshop “Workshop on digitizing photographic plates” (Meudon observatory, April 1-3, 2019)
• Special Session of the European Week of Astronomy and Space Science (EWASS) to be held in Lyon, France on June 24-28, 2019

References

Articles

• A new astrometric measurement and reduction of USNO photographic observations of the main Saturnian satellites: 1974-1998
  V. Robert, D. Pascu, V. Lainey, J.-E. Arlot, J.-P. de Cuyper, V. Dehant, W. Thuillot
  Astronomy & Astrophysics, Volume 596, id. A37, 10 pp.
  DOI: 10.1051/0004-6361/201629807
• A new astrometric measurement and reduction of USNO photographic observations of Phobos and Deimos: 1967-1997
  V. Robert, V. Lainey, D. Pascu, A. Pasewaldt, J.-E. Arlot, J.-P. de Cuyper, V. Dehant, W. Thuillot
  Astronomy & Astrophysics, Volume 582, id. A36, 8 pp.
  DOI: 10.1051/0004-6361/201526977
• A new astrometric reduction of photographic plates using the DAMIAN digitizer: improving the dynamics of the Jovian system
  V. Robert, J.-P. de Cuyper, J.-E. Arlot, G. de Decker, J. Guibert, V. Lainey, D. Pascu, L. Winter, N. Zacharias
  Monthly Notices of the Royal Astronomical Society, Volume 415, Issue 1, 8 pp.
  DOI: 10.1111/j.1365-2966.2011.18747.x

Communications to colloquia

• New Astrometric Reductions of Old Observations: The NAROO project with the Gaia reference catalogue
  J.-E. Arlot, V. Robert, V. Lainey, C. Neiner, N. Thouvenin
  International Astronomical Union, Symposium 330
• The NAROO project for overcoming past, current and future ephemeris errors
  V. Robert, V. Lainey, J.-E. Arlot, W. Thuillot
  European Space Agency 6th International Conference on Astrodynamic Tools and Techniques ICATT 2016
• The NAROO project
  N. Thouvenin, J.-E. Arlot, V. Robert
  Astroplate 2016 Meeting
• Astrometry of natural satellites: improving the dynamics of planetary systems with old observations
  V. Robert, D. Pascu, V. Lainey, J.-E. Arlot
  American Astronomical Society DDA 45, id. 305.05
• Astrometry of natural satellites: improving the dynamics of Mars, Jupiter and Saturn with old observations
  V. Robert, D. Pascu, V. Lainey, J.-E. Arlot
  American Astronomical Society DPS 46, id. 418.20

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