The astrometric Catalogue TYC2+HIP

As in the case of our FK6, (using ground based data provided by the FK5 to improve Hipparcos' results), we also used the Tycho-2 Catalogue (TYC2) to increase the number of stars with such better data: The combination of HIPPARCOS and TYC2 data gives improved results for 89 908 stars. This number of objects could be treated as single stars.
The catalogue gives proper motions with a typical mean error of 0.83 mas/year (about a factor of 1.3 better than Hipparcos for this sample of stars).

It was presented in 2001 and published online:


(Responsible for contents: C. Dettbarn)

Homepage ARI Letzte Änderung / Updated: 2005-02-17 14:58