![]() Review of the hardback: 'This book by Michael Perryman, one of the prime actors of the Hipparcos mission, is a very impressive presentation, putting into context all of the breakthroughs made using the Hipparcos and Tycho data. Standing on the eve of the next-generation astrometric projects we should be grateful to the author for providing us with such a source of inspiration.' Sergei Klioner, Lohrmann Observatory, Dresden Technical University, and President of IAU Commission 52 'Relativity in Fundamental Astronomy' It helps to raise awareness for astrometry in the astrophysical community. This book summarizes, in an elegant and clear way, the whole legacy of the Hipparcos results. Review of the hardback: 'The Hipparcos catalogue has completely redefined the discipline of astrometry and converted it into a new source of astrophysical information. There is no equivalent in astrometric literature.' Erik Hg, ESA Science Team member for Hipparcos and Gaia satellites (1975 to 2007) That is of course what we could expect from this author, but to see the book in reality is a great pleasure. It is comprehensive and meticulously correct in all details of content and form, so it appears after days of reading. Review of the hardback: 'This is a very fine book, bound to become a classic on astrometry and its applications. Bravo, Bravo!' Jean Kovalevsky, Observatoire de la Cte d'Azur and author of Fundamentals of Astrometry Michael Perryman has done a tremendous work for which I have an enthusiastic admiration. Review of the hardback: 'I am amazed by this book's completeness - it is really THE 'Hipparcos Encyclopedia'. Each chapter ends with comprehensive references to relevant literature. It contains a detailed overview of the Hipparcos and Tycho Catalogues, their annexes and their updates. It reviews the applications of the data in different areas, describing the subject and the state-of-the-art before Hipparcos, and summarising all major contributions to the topic made by Hipparcos. This authoritative account of the Hipparcos contributions over the following decade is an outstanding reference for astronomers, astrophysicists and cosmologists. Amongst the key achievements of its measurements are refining the cosmic distance scale, characterising the large-scale kinematic motions in the Solar neighbourhood, providing precise luminosities for stellar modelling, and confirming Einstein's prediction of the effect of gravity on starlight. In the case of high-accuracy astrometry of very close encounters, for example, masses of some asteroids can be obtained.The Hipparcos satellite, developed and launched by the European Space Agency (ESA) in 1989, was the first space mission dedicated to astrometry - the accurate measurement of positions, distances, and proper motions of stars. ![]() The second objective was to acquire improved positional data at a series of epochs to enable dynamical and physical studies of these objects. To date, the theoretical positional precision of asteroids had never been met observationally, and they only entered into the FK5 solution, for example, with relatively modest weight. The first was to establish the relationship between the resulting dynamical reference system and the stellar reference frame (ICRF). ![]() There were two main objectives for the inclusion of Solar System objects within the observing programme. (1998a) also summarised the measurements and reductions relevant for Solar System objects, the objects observed, and the presentation of results. Volume 3, Chapter 15 gives details of the specific data analysis aspects. A detailed description of the resulting catalogue contents is given in ESA (1997), Volume 1, Section 2.7. Reductions were accurate to the mas level for the main mission. ![]() The results concern mainly asteroids, but also the planetary satellites Europa, Ganymede, Callisto, Titan and Iapetus, and the major planets Uranus and Neptune. This chapter covers the use of the Hipparcos data in two loosely connected areas: observations and interpretation related to the Solar System, and observations related to exoplanets.Īstrometric and photometric measurements of a number of Solar System objects were performed either by the Hipparcos main instrument (and thus appear as the Hipparcos Catalogue Solar System Annex) or by the star mapper instrument (and thus appear in the Tycho Catalogue Solar System Annex). ![]()
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