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From the Roemer mission to Gaia

Published online by Cambridge University Press:  01 October 2007

E. Høg
E. Høg*
Affiliation:
Niels Bohr Institute, Copenhagen University, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark email: [email protected]
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Abstract

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At the IAU symposium in Shanghai September 1992 the present author made the first proposal for a specific mission concept post-Hipparcos, the first scanning astrometry mission with CCDs in time-delayed integration mode (TDI). Direct imaging on CCDs in long-focus telescopes was described as later adopted for the Gaia mission. The mission called Roemer was designed to provide accurate astrometry and multi-colour photometry of 400 million stars brighter than 18 mag in a five-year mission. The early years of this mission concept are reviewed.

Keywords

space vehiclesastrometryinstrumentation: photometers
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 300 - 302
Copyright
Copyright © International Astronomical Union 2008

References

ESA 2000 Gaia: Composition, Formation and Evolution of the Galaxy Technical Report ESA-SCI (2000)4Google Scholar
Høg, E. 2007, This poster on 6 pages, including the complete list of references at www.astro.ku.dk/~erik/ShanghaiPoster.pdf, and some slides at www.astro.ku.dk/~erik/ShanghaiHoeg.pdfGoogle Scholar
IAU Symposium No. 141, 1990, Lieske, J. H. & Abalakin, V. K. (eds.) Inertial Coordinate System of the Sky.Google Scholar
IAU Symposium No. 156, 1993, Mueller, I. I. & Kolaczek, B. (eds.) Developments in Astrometry and their Impact on Astrophysics and Geodynamics.Google Scholar
IAU Symposium No. 166, 1995, Høg, E. & Seidelmann, P. K. (eds.) Astronomical and Astrophysical Objectives of sub-milliarcsecond Optical Astrometry.Google Scholar