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Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS
Radial velocities have been determined for a sample of 2930 B2-F5 stars,95% observed by the Hipparcos satellite in the north hemisphere and 80%without reliable radial velocity up to now. Observations were obtainedat the Observatoire de Haute Provence with a dispersion of 80Ä,mm(-1) with the aim of studying stellar and galactic dynamics.Radial velocities have been measured by correlation with templates ofthe same spectral class. The mean obtained precision is 3.0 km s(-1)with three observations. A new MK spectral classification is estimatedfor all stars. Based on observations made at the Haute ProvenceObservatory, France and on data from The Hipparcos Catalogue, ESA.Tables 4, 5 and 6 are only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr or viahttp://cdsweb.u-strasbg.fr/Abstract.htm

Radial velocity measurements. I - Ground-based observations of the program stars for the HIPPARCOS satellite
The radial velocities of 272 stars brighter than m(pg) = 8.5 aredetermined by digital microphotometric measurement of plates obtainedwith dispersion 80 A/mm using the Marly slit spectrograph on the 120-cmtelescope of the Observatoire de Haute Provence. The objects wereselected as probable members of the input catalog for the ESA Hipparcosastrometric satellite. The measurement techniques and data-reductionprocedures are described in detail, and the results are presented inextensive tables and graphs and briefly characterized.

Stella sospetta di variabilita 22.1912 Geminorum
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Dades d'Observació i Astrometria

Constel·lació:Gemini
Ascensió Recta:06h54m07.58s
Declinació:+32°30'41.0"
Magnitud Aparent:6.952
Distancia:248.756 parsecs
Moviment propi RA:-2
Moviment propi Dec:-9.4
B-T magnitude:6.937
V-T magnitude:6.951

Catàlegs i designacions:
Noms Propis
HD 1989HD 50316
TYCHO-2 2000TYC 2441-1482-1
USNO-A2.0USNO-A2 1200-05234920
HIPHIP 33150

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