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Astron. Astrophys. 323, L49-L52 (1997)

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Letter to the Editor

The Hipparcos Catalogue *

M.A.C. Perryman 1, L. Lindegren 2, J. Kovalevsky 3, E. Hog 4, U. Bastian 5, P.L. Bernacca 6, M. Crézé 7, F. Donati 8, M. Grenon 9, M. Grewing 10, F. van Leeuwen 11, H. van der Marel 12, F. Mignard 3, C.A. Murray 13, R.S. Le Poole 14, H. Schrijver 15, C. Turon 16, F. Arenou 16, M. Froeschlé 3 and C.S. Petersen 4

1 Astrophysics Division, European Space Agency, ESTEC, Noordwijk 2200AG, The Netherlands
2 Lund Observatory, Box 43, S-22100 Lund, Sweden
3 Observatoire de la Côte d'Azur, CERGA, Avenue Copernic, F-06130 Grasse, France
4 Copenhagen University Observatory, Juliane Maries Vej 30, DK-2100 Copenhagen OE, Denmark
5 Astronomisches Rechen-Institut, Mönchhofstrasse 12-14, D-69120 Heidelberg, Germany
6 Astrophysical Observatory, via dell'Osservatorio, I-36012 Asiago, Italy
7 18 rue Nicolazic, F-56400 Sainte Anne d'Auray, France
8 Centro di Studi Sui Sistemi, Via Vincenzo Vela 27, I-10128 Torino, Italy
9 Observatoire de Genève, CH-1290 Sauverny, Switzerland
10 Astronomisches Institut, Waldhäuserstrasse 64, D-72076 Tübingen, Germany
11 Royal Greenwich Observatory, Madingley Road, Cambridge CB3 0EZ, UK
12 Department of Geodesy, Delft University of Technology, Thijsseweg 11, 2629JA Delft, The Netherlands
13 Derwent Cottage, 12 Derwent Road, Eastbourne, Sussex BN20 7PH, UK
14 Sterrewacht Leiden, Postbus 9513, 2300RA Leiden, The Netherlands
15 SRON, Sorbonnelaan 2, 3584CA Utrecht, The Netherlands
16 Section d'Astrophysique, Observatoire de Paris, F-92195 Meudon Cedex, France

Received 29 April 1997 / Accepted 1 May 1997


The principal observational characteristics of the Hipparcos Catalogue, and a summary of its main astrometric and photometric properties, are presented. Median astrometric standard errors (in position, parallax, and annual proper motion) are in the range 0.7-0.9 milliarcsec (mas) for stars brighter than 9 mag at the catalogue epoch (J1991.25). The catalogue is a materialisation of the ICRS reference system, coinciding with its principal axes at the level of [FORMULA]  mas, and with proper motions consistent with an inertial system at the level of [FORMULA]  mas/yr. The [FORMULA] constituent stars provide a mean sky density of [FORMULA]  stars deg-2. The catalogue is available in printed and machine-readable forms.

Key words: Hipparcos – astrometry – parallaxes – proper motions – catalogues

* Based on observations made with the ESA Hipparcos astrometry satellite


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© European Southern Observatory (ESO) 1997

Online publication: June 5, 1998