One possible realization of the ICRF before the GAIA frame
Abstract
A brief overview of current state of densification and extension of the HCRF (Hipparcos Celestial Reference Frame) is given. For a first step in this matter the XPM catalogue could be used. The XPM system of proper motions has been obtained by direct link of about 300 millions of stars to extragalactic sources. This catalogue has no significant magnitude equation. As a result of the comparison of the XPM with catalogues compiled in the HCRF system, a residual rotation of the HCRF system was derived. The parameters of this residual rotation could be used for combining the catalogues computed in the HCRF system and the XPM catalogue for creation of a new optical realization of the ICRF.
- Publication:
-
Journées Systèmes de Référence Spatio-temporels 2011
- Pub Date:
- December 2012
- Bibcode:
- 2012jsrs.conf...64Y