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HD 157255


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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.

Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Subtittle: Radial velocities: The Wilson-Evans-Batten catalogue.
We give a common version of the two catalogues of Mean Radial Velocitiesby Wilson (1963) and Evans (1978) to which we have added the catalogueof spectroscopic binary systems (Batten et al. 1989). For each star,when possible, we give: 1) an acronym to enter SIMBAD (Set ofIdentifications Measurements and Bibliography for Astronomical Data) ofthe CDS (Centre de Donnees Astronomiques de Strasbourg). 2) the numberHIC of the HIPPARCOS catalogue (Turon 1992). 3) the CCDM number(Catalogue des Composantes des etoiles Doubles et Multiples) byDommanget & Nys (1994). For the cluster stars, a precise study hasbeen done, on the identificator numbers. Numerous remarks point out theproblems we have had to deal with.

Spectral types of 80 early-type stars of variable radial velocity
MK spectral types are given for 80 normal early-type stars of variableradial velocity. These spectral types were determined from spectrogramstaken with the Lick Observatory 0.9-m refractor during the years1957-58.

Final catalogue of 229 photometric standards in UBV system near the selected areas 1-115
Not Available

Über die Veränderlichkeit der Sterne des Spektraltyps A
Not Available

The corrected magnitudes and colours of 278 stars near S.A. 1-139 in the UBV system
Not Available

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Membro dei seguenti gruppi:

Osservazione e dati astrometrici

Costellazione:Ercole
Ascensione retta:17h20m45.46s
Declinazione:+32°40'27.8"
Magnitudine apparente:7.008
Distanza:193.424 parsec
Moto proprio RA:0.1
Moto proprio Dec:6.1
B-T magnitude:7.04
V-T magnitude:7.011

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 157255
TYCHO-2 2000TYC 2596-780-1
USNO-A2.0USNO-A2 1200-08338374
HIPHIP 84871
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