The Hipparcos Catalogue
Publikation: Bidrag til tidsskrift › Letter › Forskning › fagfællebedømt
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 +/-0.6 mas, and with proper motions consistent with an inertial system at the level of +/-0.25 mas/yr. The 118218 constituent stars provide a mean sky density of similar to 3 stars deg(-2). The catalogue is available in printed and machine-readable forms.
Originalsprog | Engelsk |
---|---|
Tidsskrift | Astronomy & Astrophysics |
Vol/bind | 323 |
Udgave nummer | 1 |
Sider (fra-til) | L49-L52 |
Antal sider | 4 |
ISSN | 0004-6361 |
Status | Udgivet - 1 jul. 1997 |
ID: 260748881