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Spectral Classification of Stars in A Supplement to the Bright Star Catalogue
MK spectral types are given for about 584 stars in A Supplement to theBright Star Catalogue. These are compared with Hipparcos parallaxes tocheck the reliability of those classifications. The estimated errors are+/-1.2 subtypes, and 10% of the luminosity classes may be wrong.

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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Dades d'Observació i Astrometria

Constel·lació:Delphinus
Ascensió Recta:20h48m24.56s
Declinació:+03°38'56.5"
Magnitud Aparent:6.753
Distancia:1052.632 parsecs
Moviment propi RA:3.9
Moviment propi Dec:2.4
B-T magnitude:6.644
V-T magnitude:6.744

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 198167
TYCHO-2 2000TYC 516-2311-1
USNO-A2.0USNO-A2 0900-19049330
HIPHIP 102680

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