Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-12T20:36:21.105Z Has data issue: false hasContentIssue false
  • English
  • Français

Optical Counterpart Of ICRF: Hipparcos

Published online by Cambridge University Press:  14 August 2015

L. Lindegren  and
M.A.C. Perryman
L. Lindegren
Affiliation:
Lund Observatory Box 43, SE-22100 Lund, Sweden
M.A.C. Perryman
Affiliation:
Astrophysics Division, ESTEC 2200AG Noordwijk, The Netherlands

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The Hipparcos reference frame is defined by the positions and proper motions of ~105 stars given in the Hipparcos Catalogue (ESA, 1997). It is the optical counterpart of the International Celestial Reference Frame defined by the radio positions of extragalactic sources. The linking of the Hipparcos frame to the extragalactic frame is described by Kovalevsky et al. (1997) and Kovalevsky (1997). In the present review we consider only the intrinsic properties of the Hipparcos reference frame.

A complete description of the contents of the Hipparcos Catalogue is contained in Volume 1 of ESA (1997). Recent overviews have been given by Perryman et al. (1997) and Perryman (1997). The principal astrometric data provided are the barycentric coordinates (α, δ) of the stars, the trigonometric parallaxes (π) and the proper motion components (μα* = μα cos δ, μδ). These parameters are given in the main catalogue for 117955 entries along with estimated standard errors and correlation coefficients, all data being referred to the common reference epoch To = J1991.25 on the Terrestrial Time (TT) scale. Typical ranges of the astrometric standard errors and some other characteristics of the catalogue are shown in Table 1.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 11 , Issue 1: Highlights of Astronomy. As presented at the XXIIIrd General Assembly of the IAU (Part A), 1997 , 1998 , pp. 287 - 291
Copyright
Copyright © Kluwer 1998

References

Arenou, F., Lindegren, L., Frœschlé, M., et al. (1995) Zero point and external errors of Hipparcos parallaxes, A&A 304, 52 Google Scholar
ESA (1997) The Hipparcos and Tycho Catalogues, ESA SP-1200Google Scholar
Frœschlé, M., Mignard, F., Arenou, F. (1997) Determination of the PPN parameter γ with the Hipparcos data, Proc. HIPPARCOS Venice ‘97, ESA SP-402, p. 49 Google Scholar
Kovalevsky, J. (1997) Linking Hipparcos to ICRF, this volumeGoogle Scholar
Kovalevsky, J., Lindegren, L., Perryman, M.A.C., et al. (1997) The Hipparcos Catalogue as a realisation of the extragalactic reference system, A&A 323, 620 Google Scholar
Lindegren, L., Mignard, F., Söderhjelm, S., et al. (1997) Double star data in the Hipparcos Catalogue, A&A 323, L53 Google Scholar
Perryman, M.A.C. (1997) The Hipparcos Catalogue contents, Proc. HIPPARCOS Venice ‘97, ESA SP-402, p. 1Google Scholar
Perryman, M.A.C., Lindegren, L., Kovalevsky, J., et al. (1997) The Hipparcos Catalogue, A&A 323, L49 Google Scholar
Widen, R. (1997) Principles of statistical astrometry, A&A 325, 367 Google Scholar