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A New Era of Global Astrometry. II: A 10 Microarcsecond Mission

Published online by Cambridge University Press:  07 August 2017

E. Høg
E. Høg*
Affiliation:
Copenhagen University Observatory – NBIfAFG Østervoldgd. 3 DK-1350 Copenhagen K, Denmark

Abstract

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A ground-based project for a small telescope about 20 cm aperture is proposed. It would be able to obtain 500 million astrometric observations per year of all stars between V=7 and 18 mag, based on the Hipparcos-Tycho reference net of one million stars. In addition, V and I magnitudes for all stars from V=7 to 17 mag would be obtained. — A new space mission is proposed, capable of obtaining 10 microarcsecond (μas) precision for parallaxes and proper motions of stars of V = 11 mag, and a precision of 0.5 millimagnitude (mmag) for intermediate-band photometry. The mission is here called Roemer Plus (or Roemer+) and the design is derived from Hipparcos and Roemer, but a larger telescope aperture and high-precision metrology is applied. At magnitude V = 20 a precision of 1.0 milliarcsecond (mas) would be achieved.

Type
3. Expected Developments in High Precision Astrometry
Information
Symposium - International Astronomical Union , Volume 166: Astronomical and Astrophysical Objectives of Sub-Milliarcsecond Optical Astrometry , 1995 , pp. 317 - 322
Copyright
Copyright © Kluwer 1995 

References

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