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Mesures de vitesses radiales. V. Accompagnement AU sol du programme d'observation du satellite Hipparcos.

Duflot, M.; Burnage, R.; Genty, V. +2 more

The paper presents data on 1070 radial velocity measurements of stars distributed in 39 fields measuring 4 deg x 4 deg. The PPO series of Fehrenbach et al. (1987) and Duflot et al. (1990) is continued using the Fehrenbach objective prism method.

Mesures de vitesses radiales. VI. Accompagnement AU sol du programme d'observation du satellite Hipparcos.

Burnage, R.; Fehrenbach, Ch.; Figuiere, J.

A list of radial velocities of 2601 stars obtained with the Fehrenbach objective prism associated with the Schmidt telescope of the Haute Provence Observatory is presented. These stars belong to specially chosen fields containing several Hipparcos input catalog star members. A total of 440 probable radial-velocity variable was observed. Sixty-nine…

Ephemerides of the 48 HIPPARCOS minor planets for the year 1992

Bec-Borsenberger, A.

To be observed by Hipparcos, the position of each object has to be known with an accuracy of 1 arcsecond and its magnitude with an accuracy of 0.5 mag. Therefore, the orbital elements of the 48 selected minor planets of the Hipparcos mission, have been improved in order to extrapolate their ephemerides with the accuracy required. Updated ephemerid…

Precise equatorial coordinates of double and multiple systems : an astronomical support to the HIPPARCOS mission.

Pannunzio, R.; Lattanzi, M. G.; Morbidelli, R. +3 more

Results are presented on determinations of precise positions (to the accuracy required for their possible inclusion in the Hipparcos Input Catalogue) of 623 double and multiple stars (126 of them newly discovered) from the measurement of 39 plates taken at the ESO and the Astronomical Observatory of Torino, obtained between 1984 and 1987. The tabl…

On zenith-distance variations of the Borowiec astrolabe

Lehmann, M.; Wiktorowski, J.

Systematic differences between zenith distances of two groups of stars observed successively during the same night occur in observations carried out with the Danjon Astrolabe in Borowiec. Four suggestions for the determination of an additional parameter correlated in the best way with the observed variations of zenith distance are made. The best c…