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Media type:
E-Article
Title:
From the Roemer mission to Gaia
Contributor:
Høg, E.
Published:
Cambridge University Press (CUP), 2007
Published in:
Proceedings of the International Astronomical Union, 3 (2007) S248, Seite 300-302
Language:
English
DOI:
10.1017/s1743921308019418
ISSN:
1743-9213;
1743-9221
Origination:
Footnote:
Description:
AbstractAt 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.