Search Publications

Photographic Zenith Tubes Observations to Improve HIPPARCOS Proper Motion in Declination of Some Stars

Damljanovic, G.

A procedure of calculation and results of an attempt to improve proper motions in declination for some HIPPARCOS stars are presented. A long series of optical observations of these stars observed with Photographic Zenith Tubes (PZT) are used. The HIPPARCOS ESA mission (ESA 1997) was nearly 4 years long, but each of the different Earth rotation pro…