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Enviar un nuevo artículo| The 74th Special Name-list of Variable Stars We present the Name-list introducing GCVS names for 3153 variable starsdiscovered by the Hipparcos mission.
 
 
 |  | 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
 
 
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 Datos observacionales y astrométricos
| Constelación: | Águila |  | Ascensión Recta: | 19h10m09.86s |  | Declinación: | +02°21'26.6" |  | Magnitud Aparente: | 7.88 |  | Distancia: | 456.621 parsecs |  | Movimiento Propio en Ascensión Recta: | -1.3 |  | Movimiento Propio en Declinación: | -5.5 |  | B-T magnitude: | 8.306 |  | V-T magnitude: | 7.916 |  Catálogos y designaciones:
 
 
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