| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 144, Number 1, May II 2000
|
|
|---|---|---|
| Page(s) | 45 - 51 | |
| DOI | https://doi.org/10.1051/aas:2000198 | |
| Published online | 15 May 2000 | |
Hipparcos astrometry for 257 stars using Tycho-2 data *,**
Copenhagen University Observatory, Juliane Maries Vej 30, DK–2100 Copenhagen Ø, Denmark e-mail: cf@astro.ku.dk, makarov@astro.ku.dk
Received:
6
December
1999
Accepted:
18
February
2000
We present improved Hipparcos astrometry for 257 Hipparcos stars, resolved into 342 components. For 64 of the stars no astrometry was obtained in the Hipparcos Catalogue, while for the remaining stars additional components have been added by this solution or the positions have been revised considerably. We have used the published Hipparcos transit data for the new solutions, together with results from the second reduction of the Tycho data for defining better initial values.
Key words: astrometry / catalogs / stars: fundamental parameters / binaries: visual
© European Southern Observatory (ESO), 2000